APP?DaFit Chip: Rtl8762 BK3266 Screen size: 1.69 inches Resolution: 240*285 Touch Type: Full touch Battery capacity: 210mAh Charging Method: magnetic charging Bluetooth version: 5.0 3.0 Color: black, gold, silver Main functions: Bluetooth calling, Bluetooth music, pedometer/calories, sleep monitoring, vibration motor, alarm clock reminder, call rejection, stopwatch, multi-sport mode, remind of long-time sitting, Call Reminder/SMS reminder, other push, WeChat Sports, dynamic heart rate, remote control photography, dial selection, remote control music, air upgrade Appearance material: zinc alloy APP Support languages: Chinese, Traditional Chinese, English, Korean, German, Spanish, Japanese, French, Italian, Russian, Portuguese, Arabic, Ukrainian Bracelet firmware language: Chinese, Traditional Chinese, English, German, Korean, Spanish, Japanese, French, Russian, Arabic, Ukrainian Instruction Language: English, Japanese, French, German, Spanish, Italian, Chinese, Russian Packing size:Machine size 250*38 * 10MM (length, width and height)Packing box size (mm) 140*100 * 30MMNet Weight (g) 46gGross Weight (g) 143g50 units per boxWeight per box (g) 7.6kg