Product type : Smart Watch Wristband size: 255mm*20mm*2.3mm Body size: diameter 42.5mm*9.9mm Weight: 48g Screen size: 1.3inch Resolution: 240*240 Size: GT3 Capacity: 170mAH Upper cover: glass Body: zinc alloy plating Strap: Silicone Software function: Time display, Step count, Calories, Distance, Exercise Mode, Raise your hand to brighten the screen, Sleep monitoring, Running track, Call reminder, Message reminder, Alarm clock reminder, Do not disturb mode, Shake watch to take pictures, Find bracelet, Health Check In, Weather, Body temperature detection, Environmental temperature detection, Hourly measurement, WeChat exercise, Heart rate, Continuous heart rate, Blood pressure, Blood oxygen, Google Fit, Health weekly report. APP language: English, Chinese, Traditional Chinese, French, German, Japanese, Spanish, Italian, Korean, Russian, Czech, Portuguese, Turkish, Hebrew, Greek, Latin, Vietnamese, Danish 18 languages. Compatible systems: Above Android 4.4 and IOS 8.5. Packing list: 1 x Watch Strap 1 x Watch Dial 1 x Charging clip 1 x Instruction 1 x card *After receiving the product, please read the instruction carefully. *Watch straps are separated from the main dial in the package box, you need to install the straps using the two little spring bars. *To charge the watch, please make sure that the contacts of charging clip well target the contacts of the watch. *This watch is NOT intended as a medical device. The measurement data and results are for reference only and are not used as a basis for diagnosis or treatment.