English
全部
图片
视频
地图
资讯
购物
更多
航班
旅游
酒店
搜索
笔记本
报告不当内容
请选择下列任一选项。
无关
低俗内容
成人
儿童性侵犯
时长
全部
短(小于 5 分钟)
中(5-20 分钟)
长(大于 20 分钟)
日期
全部
过去 24 小时
过去一周
过去一个月
去年
清晰度
全部
低于 360p
360p 或更高
480p 或更高
720p 或更高
1080p 或更高
源
全部
Dailymotion
Vimeo
Metacafe
Hulu
VEVO
Myspace
MTV
CBS
Fox
CNN
MSN
价格
全部
免费
付费
清除筛选条件
安全搜索:
中等
严格
中等(默认)
关闭
筛选器
购买 HP 400D
赞助
$199.00
HP Laserjet Pro 4001N Black & White Printer, Print, Fast Speeds, Easy Setup, Mobile Printing, Advanced Security, USB, Ethernet Connection,
Amazon.com
Free shipping
$199.00
HP Laserjet Pro 4001N Black & White Printer, Print, Fast Speeds, Easy Setup, Mobile Printing, Advanced Security, USB, Ethernet Connection,
Amazon.com
Free shipping
$124.00
HP Laserjet Pro 400 M401dne Monochrome Printer (CF399A) - (Renewed)
Amazon.com
Free shipping
$124.00
HP Laserjet Pro 400 M401dne Monochrome Printer (CF399A) - (Renewed)
Amazon.com
Free shipping
$579.00
HP Prodesk 400 G9 Small Form Factor Business Desktop, 13th Gen Intel 14-Core I5-13500 Processor, 16GB RAM, 256GB SSD, Wi-Fi 6, HDMI, DP, Support 2
Amazon.com
Free shipping
$579.00
HP Prodesk 400 G9 Small Form Factor Business Desktop, 13th Gen Intel 14-Core I5-13500 Processor, 16GB RAM, 256GB SSD, Wi-Fi 6, HDMI, DP, Support 2
Amazon.com
Free shipping
$399.99
HP Pro 400 G9 Mini PC Desktop Computer, Intel CPU, 16GB DDR5 RAM, 256GB Pcie SSD, Triple 4K Display Support, USB-C, Ultra-Quiet Design, Bluetooth
Amazon.com
Free shipping
$399.99
HP Pro 400 G9 Mini PC Desktop Computer, Intel CPU, 16GB DDR5 RAM, 256GB Pcie SSD, Triple 4K Display Support, USB-C, Ultra-Quiet Design, Bluetooth
Amazon.com
Free shipping
$161.97
HP 24Mh FHD Computer Monitor With 23.8-Inch IPS Display (1080P) - Built-In Speakers And VESA Mounting - Height/Tilt Adjustment For Ergonomic Viewing
Amazon.com
Free shipping
$161.97
HP 24Mh FHD Computer Monitor With 23.8-Inch IPS Display (1080P) - Built-In Speakers And VESA Mounting - Height/Tilt Adjustment For Ergonomic Viewing
Amazon.com
Free shipping
$65.00
Hewlett Packard Hp Model 400D 400 D Vacuum Tube Voltmeter Industrial
eBay
Free shipping
$65.00
Hewlett Packard Hp Model 400D 400 D Vacuum Tube Voltmeter Industrial
eBay
Free shipping
$129.99
Renewed HP Laserjet Pro 400 M401DNE M401 CF399ABGJ Printer With New 80A Toner And 90/Day Warranty
Amazon.com
Free shipping
$129.99
Renewed HP Laserjet Pro 400 M401DNE M401 CF399ABGJ Printer With New 80A Toner And 90/Day Warranty
Amazon.com
Free shipping
$349.00
Hp Prodesk 400 G9 Sff Desktop Pentium Gold G7400 3.7Ghz 32Gb 256Gb
eBay
Free shipping
$349.00
Hp Prodesk 400 G9 Sff Desktop Pentium Gold G7400 3.7Ghz 32Gb 256Gb
eBay
Free shipping
$1,439.00
HP Pro 400 G9 Small Form Factor Desktop Computer
B&H Photo-Video-Pro A
Free shipping
$1,439.00
HP Pro 400 G9 Small Form Factor Desktop Computer
B&H Photo-Video-Pro A
Free shipping
$599.00
HP Pro Mini 400 G9 Business Mini Desktop Computer, 12th Gen Intel Hexa-Core I5-12500T (Beat I7-11700T), 16GB DDR4 RAM, 512GB SSD, Wifi 6, Bluetooth
Amazon.com
17
Free shipping
$599.00
HP Pro Mini 400 G9 Business Mini Desktop Computer, 12th Gen Intel Hexa-Core I5-12500T (Beat I7-11700T), 16GB DDR4 RAM, 512GB SSD, Wifi 6, Bluetooth
Amazon.com
17
$80.88
HP 400D Vacuum Tube Voltmeter Barn Find Untested Parts Only
eBay.com
Free shipping
$80.88
HP 400D Vacuum Tube Voltmeter Barn Find Untested Parts Only
eBay.com
Free shipping
$2,389.00
HP Color Laserjet Enterprise 6701Dn Printer
B&H Photo-Video-Pro A
Free shipping
$2,389.00
HP Color Laserjet Enterprise 6701Dn Printer
B&H Photo-Video-Pro A
Free shipping
$539.95
HP Pro Mini 400 G9 Business Desktop Intel 14 Core I5-13600T, (Beats Intel I7-12700T), 16GB RAM, 256GB Nvme, Wifi 6 + BT, RJ-45, 2X DP Port, HDMI,
Amazon.com
Free shipping
$539.95
HP Pro Mini 400 G9 Business Desktop Intel 14 Core I5-13600T, (Beats Intel I7-12700T), 16GB RAM, 256GB Nvme, Wifi 6 + BT, RJ-45, 2X DP Port, HDMI,
Amazon.com
Free shipping
$229.00
HP Laserjet Pro M404dn Monochrome Laser Printer With Built-In Ethernet & Double-Sided Printing, Amazon Dash Replenishment Ready (W1A53A) (Renewed)
Amazon.com
25
Free shipping
$229.00
HP Laserjet Pro M404dn Monochrome Laser Printer With Built-In Ethernet & Double-Sided Printing, Amazon Dash Replenishment Ready (W1A53A) (Renewed)
Amazon.com
25
$113.99
Hewlett Packard Hp 400D Vacuum Tube Voltmeter - No Handle
eBay
$113.99
Hewlett Packard Hp 400D Vacuum Tube Voltmeter - No Handle
eBay
$1,649.00
HP Pro Mini 400 G9 Desktop PC | Intel Core i5 14th Gen | Windows 11 Pro | 256 GB SSD | 16 GB DDR5 | AJ5A1UAABA
HP
$1,649.00
HP Pro Mini 400 G9 Desktop PC | Intel Core i5 14th Gen | Windows 11 Pro | 256 GB SSD | 16 GB DDR5 | AJ5A1UAABA
HP
$538.90
HP Laserjet Pro MFP 4101Fdw Wireless Black & White All-In-One Laser Printer, Scanner, Copier, Fax, Best-For-Office (2Z619F)
Amazon.com
212
Free shipping
$538.90
HP Laserjet Pro MFP 4101Fdw Wireless Black & White All-In-One Laser Printer, Scanner, Copier, Fax, Best-For-Office (2Z619F)
Amazon.com
212
$2,225.00
HP Designjet T630 Large Format 36-Inch Plotter Printer, With Auto Sheet Feeder, Media Bin & Stand (5HB11D) - New Model
Amazon.com
Free shipping
$2,225.00
HP Designjet T630 Large Format 36-Inch Plotter Printer, With Auto Sheet Feeder, Media Bin & Stand (5HB11D) - New Model
Amazon.com
Free shipping
$918.90
HP Color Laserjet Enterprise M554dn Duplex Printer (7ZU81A),White
Amazon.com
Free shipping
$918.90
HP Color Laserjet Enterprise M554dn Duplex Printer (7ZU81A),White
Amazon.com
Free shipping
$1,211.19
HP Business Desktop Prodesk 400 G7 Desktop Computer
ODP Business Solutions
$1,211.19
HP Business Desktop Prodesk 400 G7 Desktop Computer
ODP Business Solutions
$229.00
Hp Laserjet Pro 400 M451dn Color Laser Printer
eBay
Free shipping
$229.00
Hp Laserjet Pro 400 M451dn Color Laser Printer
eBay
Free shipping
$199.99
$309.99
HP - Laserjet Pro 4001N Black-And-White Laser Printer - White
Best Buy
139
折扣 35%
$199.99
$309.99
HP - Laserjet Pro 4001N Black-And-White Laser Printer - White
Best Buy
139
$5,399.00
Xerox Altalink C8155 Color Copier Printer Scanner
Prestige Office Solutions
$5,399.00
Xerox Altalink C8155 Color Copier Printer Scanner
Prestige Office Solutions
$197.00
$277.00
HP Laserjet Pro 400 Color Printer M451dn
PrinterStop
28
折扣 28%
$197.00
$277.00
HP Laserjet Pro 400 Color Printer M451dn
PrinterStop
28
$359.00
Hp Laserjet Pro 4001Dn Black And White Printer (Open Box) + 1 Year
eBay
2
Free shipping
$359.00
Hp Laserjet Pro 4001Dn Black And White Printer (Open Box) + 1 Year
eBay
2
$69.99
Hp Pro 400 M401dn Workgroup Laserjet Printer
eBay
10
Free shipping
$69.99
Hp Pro 400 M401dn Workgroup Laserjet Printer
eBay
10
$409.00
HP Color Laserjet Pro MFP 3301Fdw Wireless All-In-One Color Laser Printer, Office Printer, Scanner, Copier, Fax, ADF, Duplex, Best-For-Office
Amazon.com
Free shipping
$409.00
HP Color Laserjet Pro MFP 3301Fdw Wireless All-In-One Color Laser Printer, Office Printer, Scanner, Copier, Fax, ADF, Duplex, Best-For-Office
Amazon.com
Free shipping
$199.00
HP Laserjet MFP M234sdw Wireless Printer, Print, Scan, Copy, Fast Speeds, Easy Setup, Mobile Printing, Best-For-Small Teams
Amazon.com
207
Free shipping
$199.00
HP Laserjet MFP M234sdw Wireless Printer, Print, Scan, Copy, Fast Speeds, Easy Setup, Mobile Printing, Best-For-Small Teams
Amazon.com
207
$255.94
Hp Prodesk 400 G3 Desktop Computer Windows 10 Pc Intel Core i5 16Gb
eBay
$255.94
Hp Prodesk 400 G3 Desktop Computer Windows 10 Pc Intel Core i5 16Gb
eBay
$306.64
Hp Prodesk 400 G6 Sff Intel Core I5-9500 Uhd Graphics 630 8Gb Ddr4
eBay
Free shipping
$306.64
Hp Prodesk 400 G6 Sff Intel Core I5-9500 Uhd Graphics 630 8Gb Ddr4
eBay
Free shipping
$1,008.90
HP Laserjet Enterprise M607n Monochrome Printer With Built-In Ethernet (K0Q14A) Grey
Amazon.com
105
Free shipping
$1,008.90
HP Laserjet Enterprise M607n Monochrome Printer With Built-In Ethernet (K0Q14A) Grey
Amazon.com
105
$329.99
Hp Pavilion Slimline 400-334 Desktop Amd E1-2500, 500Gb Hdd,4Gb Ram,
eBay
Free shipping
$329.99
Hp Pavilion Slimline 400-334 Desktop Amd E1-2500, 500Gb Hdd,4Gb Ram,
eBay
Free shipping
$149.99
Hp Laserjet Pro 400 M451dn Color Laser Printer Ce957a W/ 102K Page
eBay
17
$149.99
Hp Laserjet Pro 400 M451dn Color Laser Printer Ce957a W/ 102K Page
eBay
17
$149.47
Hp Laserjet Pro 400 M425dn All-In-One Monochrome Laser Printer
eBay
$149.47
Hp Laserjet Pro 400 M425dn All-In-One Monochrome Laser Printer
eBay
$149.99
Hp Laserjet Pro 4001Dn Monochrome High Performance Printer Open Box
eBay
Free shipping
$149.99
Hp Laserjet Pro 4001Dn Monochrome High Performance Printer Open Box
eBay
Free shipping
$662.40
Hp Laserjet Pro 400 M401dne Network Monochrome Laser Printer With Free File Folders
Walmart
$662.40
Hp Laserjet Pro 400 M401dne Network Monochrome Laser Printer With Free File Folders
Walmart
hp.com
HP LaserJet Managed E40040dn Software and Driver Downloads | HP® Support
Download the latest drivers, firmware, and software for your HP LaserJet Managed E40040dn. This is HP’s official website to download the correct drivers free of cost for Windows and Mac.
2023年11月7日
HP 200i Review
HP 200LX Computer Review
atariage.com
2022年8月28日
Yamaha EF2000iSv2 Review | Is It Really Better?
generatormag.com
2009年1月1日
Honda EU2200i Review | A Strong Contender
generatormag.com
2020年8月24日
热门视频
How to Install Software and Drivers for HP LaserJet and PageWide Printers
hp.com
11 个月之前
0:52
HX_Cloud_Jet_Feature_Video_4K_CLEAN_3490151_v1.mp4
hp
6 天之前
HP ProDesk 400 G5 Microtower PC Software and Driver Downloads | HP® Support
hp.com
2023年11月8日
HP 200i Unboxing
How to unbox and setup the HP DeskJet 2800/e, 4200/e, and Ultra 4900/e printer series
hp.com
3 个月之前
How to unbox and setup the HP DeskJet 2800/e, 4200/e, and Ultra 4900/e printer series
hp.com
2023年11月8日
How to unbox and setup the HP DeskJet 2800/e, 4200/e, and Ultra 4900/e printer series
hp.com
2023年11月8日
How to Install Software and Drivers for HP LaserJet and PageWide Pri
…
11 个月之前
hp.com
0:52
HX_Cloud_Jet_Feature_Video_4K
…
6 天之前
hp
HP ProDesk 400 G5 Microtower PC Software and Driver Downloads |
…
2023年11月8日
hp.com
Installing an HP Printer with an Alternate Driver in Windows 7 for
…
10 个月之前
hp.com
Installing an HP Printer with an Alternate Driver in Windows 7 for
…
2023年8月10日
hp.com
HP LaserJet Managed E40040dn Mono A4 Printer | Global Office M
…
已浏览 5 次
2021年3月1日
gom.com.au
3:13
Hp ProDesk 400 G4-How To Enable USB,DvD Boot Options UEFI Boo
…
已浏览 1875 次
2022年6月19日
YouTube
John Galiwango
奔驰400d配置表
2024年1月8日
douyin.com
1:26
佳能400d和佳能1000d对比
2023年12月1日
douyin.com
拍照的钱师傅
0:08
佳能相机400d使用教程
2023年10月15日
douyin.com
买相机不拍照
0:08
Sabari on Instagram: "Hp laserjet 400d used Printer Available Good
…
已浏览 1041 次
8 个月之前
Instagram
sabari_sabari_sai
2:00
佳能400D的单反相机的使用教程
2013年12月21日
sohu
小狐狸199307838
1:34
“什么是400D呢?”资深玩家带你了解奔驰G级AMG的秘密。
已浏览 488 次
7 个月之前
bilibili
天津港大凯全国可分期
10:33
Corsair 4000D Review
已浏览 16.6万 次
2020年9月16日
YouTube
Vortez
14:52
Canon EOS 400D
已浏览 5461 次
2020年12月6日
YouTube
ChristopherKblog
5:01
梅赛德斯-奔驰2019款 G 400d 经典豪华SUV
已浏览 6288 次
2019年7月22日
bilibili
Victor555666
3:28
HP Workstation Z400 Desktop
已浏览 4271 次
2011年3月24日
YouTube
computertv
5:30
HP ProDesk 400 G4 透明探索版 超薄MINI机箱 桌面小机箱
已浏览 1128 次
2023年11月4日
bilibili
那秋天_RC
11:26
HP ProDesk 400 G4 SFF PC, Teardown
已浏览 1.5万 次
2021年3月17日
YouTube
Mxkdi
2:01
HP ProDesk 400 G2 initial impressions
已浏览 1.4万 次
2015年10月30日
YouTube
Inspire2Rise
15:10
Corsair 4000D Airflow & 4000X teardown and tour
已浏览 7.2万 次
2020年9月23日
YouTube
PCWorld
14:04
2021 Mercedes S Class 400d (330hp) - Sound & Visual Review!
已浏览 17.9万 次
2020年11月28日
YouTube
Visual Car Reviews
3:11
Canon EOS 400D / Digital Rebel XTi overview
已浏览 49.9万 次
2006年9月5日
YouTube
Gordon Laing
5:06
2021 Mercedes-AMG GLE 63 S Coupe - Sound, Interior and Exteri
…
已浏览 365.8万 次
2020年10月19日
YouTube
RoCars
8:20
Corsair 4000D Airflow Mid-Tower PC Case Review
已浏览 22.3万 次
2021年1月21日
YouTube
ECPU
1:34
Canon EOS 4000D review - brief overview
已浏览 31.1万 次
2018年2月26日
YouTube
Gordon Laing
9:08
2020 Mercedes GLS 400d (331hp) - Sound & Visual Review!
已浏览 124.4万 次
2020年6月9日
YouTube
Visual Car Reviews
4:47
佳能400D 简单评测(有样片)
已浏览 4.9万 次
2022年9月30日
bilibili
Zhuzzyi
4:22
Canon EOS 400D DSLR Camera Review
已浏览 1.2万 次
2021年5月11日
YouTube
Refined Photography
观看更多视频
更多类似内容
购买 HP 400D
赞助
$199.00
HP Laserjet Pro 4001N Black & White Printer, Print, Fast Speeds, Easy Setup, Mobile Printing, Advanced Security, USB, Ethernet Connection,
Amazon.com
Free shipping
$199.00
HP Laserjet Pro 4001N Black & White Printer, Print, Fast Speeds, Easy Setup, Mobile Printing, Advanced Security, USB, Ethernet Connection,
Amazon.com
Free shipping
$124.00
HP Laserjet Pro 400 M401dne Monochrome Printer (CF399A) - (Renewed)
Amazon.com
Free shipping
$124.00
HP Laserjet Pro 400 M401dne Monochrome Printer (CF399A) - (Renewed)
Amazon.com
Free shipping
$579.00
HP Prodesk 400 G9 Small Form Factor Business Desktop, 13th Gen Intel 14-Core I5-13500 Processor, 16GB RAM, 256GB SSD, Wi-Fi 6, HDMI, DP, Support 2
Amazon.com
Free shipping
$579.00
HP Prodesk 400 G9 Small Form Factor Business Desktop, 13th Gen Intel 14-Core I5-13500 Processor, 16GB RAM, 256GB SSD, Wi-Fi 6, HDMI, DP, Support 2
Amazon.com
Free shipping
$399.99
HP Pro 400 G9 Mini PC Desktop Computer, Intel CPU, 16GB DDR5 RAM, 256GB Pcie SSD, Triple 4K Display Support, USB-C, Ultra-Quiet Design, Bluetooth
Amazon.com
Free shipping
$399.99
HP Pro 400 G9 Mini PC Desktop Computer, Intel CPU, 16GB DDR5 RAM, 256GB Pcie SSD, Triple 4K Display Support, USB-C, Ultra-Quiet Design, Bluetooth
Amazon.com
Free shipping
$161.97
HP 24Mh FHD Computer Monitor With 23.8-Inch IPS Display (1080P) - Built-In Speakers And VESA Mounting - Height/Tilt Adjustment For Ergonomic Viewing
Amazon.com
Free shipping
$161.97
HP 24Mh FHD Computer Monitor With 23.8-Inch IPS Display (1080P) - Built-In Speakers And VESA Mounting - Height/Tilt Adjustment For Ergonomic Viewing
Amazon.com
Free shipping
$65.00
Hewlett Packard Hp Model 400D 400 D Vacuum Tube Voltmeter Industrial
eBay
Free shipping
$65.00
Hewlett Packard Hp Model 400D 400 D Vacuum Tube Voltmeter Industrial
eBay
Free shipping
$129.99
Renewed HP Laserjet Pro 400 M401DNE M401 CF399ABGJ Printer With New 80A Toner And 90/Day Warranty
Amazon.com
Free shipping
$129.99
Renewed HP Laserjet Pro 400 M401DNE M401 CF399ABGJ Printer With New 80A Toner And 90/Day Warranty
Amazon.com
Free shipping
$349.00
Hp Prodesk 400 G9 Sff Desktop Pentium Gold G7400 3.7Ghz 32Gb 256Gb
eBay
Free shipping
$349.00
Hp Prodesk 400 G9 Sff Desktop Pentium Gold G7400 3.7Ghz 32Gb 256Gb
eBay
Free shipping
$1,439.00
HP Pro 400 G9 Small Form Factor Desktop Computer
B&H Photo-Video-Pro A
Free shipping
$1,439.00
HP Pro 400 G9 Small Form Factor Desktop Computer
B&H Photo-Video-Pro A
Free shipping
$599.00
HP Pro Mini 400 G9 Business Mini Desktop Computer, 12th Gen Intel Hexa-Core I5-12500T (Beat I7-11700T), 16GB DDR4 RAM, 512GB SSD, Wifi 6, Bluetooth
Amazon.com
17
Free shipping
$599.00
HP Pro Mini 400 G9 Business Mini Desktop Computer, 12th Gen Intel Hexa-Core I5-12500T (Beat I7-11700T), 16GB DDR4 RAM, 512GB SSD, Wifi 6, Bluetooth
Amazon.com
17
$80.88
HP 400D Vacuum Tube Voltmeter Barn Find Untested Parts Only
eBay.com
Free shipping
$80.88
HP 400D Vacuum Tube Voltmeter Barn Find Untested Parts Only
eBay.com
Free shipping
$2,389.00
HP Color Laserjet Enterprise 6701Dn Printer
B&H Photo-Video-Pro A
Free shipping
$2,389.00
HP Color Laserjet Enterprise 6701Dn Printer
B&H Photo-Video-Pro A
Free shipping
$539.95
HP Pro Mini 400 G9 Business Desktop Intel 14 Core I5-13600T, (Beats Intel I7-12700T), 16GB RAM, 256GB Nvme, Wifi 6 + BT, RJ-45, 2X DP Port, HDMI,
Amazon.com
Free shipping
$539.95
HP Pro Mini 400 G9 Business Desktop Intel 14 Core I5-13600T, (Beats Intel I7-12700T), 16GB RAM, 256GB Nvme, Wifi 6 + BT, RJ-45, 2X DP Port, HDMI,
Amazon.com
Free shipping
$229.00
HP Laserjet Pro M404dn Monochrome Laser Printer With Built-In Ethernet & Double-Sided Printing, Amazon Dash Replenishment Ready (W1A53A) (Renewed)
Amazon.com
25
Free shipping
$229.00
HP Laserjet Pro M404dn Monochrome Laser Printer With Built-In Ethernet & Double-Sided Printing, Amazon Dash Replenishment Ready (W1A53A) (Renewed)
Amazon.com
25
$113.99
Hewlett Packard Hp 400D Vacuum Tube Voltmeter - No Handle
eBay
$113.99
Hewlett Packard Hp 400D Vacuum Tube Voltmeter - No Handle
eBay
$1,649.00
HP Pro Mini 400 G9 Desktop PC | Intel Core i5 14th Gen | Windows 11 Pro | 256 GB SSD | 16 GB DDR5 | AJ5A1UAABA
HP
$1,649.00
HP Pro Mini 400 G9 Desktop PC | Intel Core i5 14th Gen | Windows 11 Pro | 256 GB SSD | 16 GB DDR5 | AJ5A1UAABA
HP
$538.90
HP Laserjet Pro MFP 4101Fdw Wireless Black & White All-In-One Laser Printer, Scanner, Copier, Fax, Best-For-Office (2Z619F)
Amazon.com
212
Free shipping
$538.90
HP Laserjet Pro MFP 4101Fdw Wireless Black & White All-In-One Laser Printer, Scanner, Copier, Fax, Best-For-Office (2Z619F)
Amazon.com
212
$2,225.00
HP Designjet T630 Large Format 36-Inch Plotter Printer, With Auto Sheet Feeder, Media Bin & Stand (5HB11D) - New Model
Amazon.com
Free shipping
$2,225.00
HP Designjet T630 Large Format 36-Inch Plotter Printer, With Auto Sheet Feeder, Media Bin & Stand (5HB11D) - New Model
Amazon.com
Free shipping
Hp Laserjet Pro 400 M401dn Toner | Exclusive Deals and Offers
https://www.amazon.com › Shop › hp laserjet pro 400 m401dn toner
赞助
Choose from laptop accessories, monitors, networking products, servers and more. Get d…
Shop Best Sellers · Fast Shipping · Big Spring Sale 3/25-3/31 · Explore Amazon Devices
反馈