• 380+ 種個性組合是指小米手環 4 將有77款不同的彩色主題，結合4款不同顔色的腕帶，將會有385種不同的組合方式，首期上線錶盤為53款，後續持續增加；

The Xiaomi Mi Smart Band 4 (Xiaomi Mi Band 4 in China) is a wearable activity tracker produced by Xiaomi Inc released in China on 16 June 2019, [2] in Europe on 26 June 2019 [3] and in India on 19 September 2019.

2021年11月30日 · The Mi Band 4 will keep track of all the basics: steps taken, distance traveled, calories burned, resting and active heart rates, and sleep.

The Mi Smart Band 4 features a 39.9%* wider, full-color AMOLED touch display. With 5 adjustable brightness levels up to 400 nits, you can view the screen clearly even in broad daylight.

Mi Smart Band 4-Step up, live more. Full colour display and heart rate monitor. Check out more features, price and buy Mi Smart Band 4 from official online shop.

2019年7月30日 · The Xiaomi Mi Smart Band 4 counts your steps, tracks your sleep, monitors your heart rate, works with your phone’s GPS, has good software, and a battery that lasts at least 20 days.

2019年11月25日 · The Mi Band 4 has 50-meter water resistance and a 6-axis accelerometer, and Xiaomi has added a host of new workouts to the band's activity tracking.

2019年12月8日 · The Mi Band 4 undercuts rival fitness bands with excellent features at half the price.

2019年6月17日 · Xiaomi Mi Band 4 Color Screen Smart Miband 4 Bracelet Heart Rate Fitness BT 5.0 AI Heart Rate . SKU: MGW4052GL Color: Black Global Version. Product name: Mi Band 4; Activity Tracking: Count steps, distance, calories burned; Health monitoring 24/7 heart rate monitoring, heart rate alerts; Waterproof level 5 ATM; Screen type 0.95 inch AMOLED