Xiaomi Mi Band 3

The Xiaomi Mi Band 3 is a wearable activity tracker produced by Xiaomi Inc. It was released on 31 May 2018. It has a capacitive OLED display. The tracker features heart rate monitoring, although it does not offer continuous heart rate display.

Specifications

 * Display: 0.78 inch OLED, single point touch screen;
 * Resolution: 128 × 80 pixels;
 * Button: capacitive;
 * Connectivity: Bluetooth version 4.2 BLE; NFC on some models;
 * Size: 46.9 × 17.9 × 12 mm;
 * Weight: 20 g;
 * Casing: plastic + alloy;
 * Battery capacity: 110 mAh for 20 days of battery life;
 * Sensors: accelerometer, optical heart rate monitor;
 * Waterproof: up to 50 metres, 5 atmospheres