Compatible systems: Android4.4 or above, IOS8.2 or above Flash memory: 128K+64M Screen type: TFT Screen size: 1.4 Resolution: 240*240 Touch screen type: full TP--COF Bluetooth: BT5.0 Acceleration sensor: STK8321 Heart rate: HX3300 Body temperature: Temperature sensor CT1711 (contact body temperature measurement) Battery type: Lithium polymer battery Capacity: 160mAH Charging method: Magnetic Function: Sports step counting, calories, distance, sports mode Health: body temperature, blood pressure, heart rate, blood oxygen, sedentary reminder, sleep monitoring, automatic heart rate monitoring, etc. Social sharing WeChat, QQ, LINE, Facebook, Twitter, KaoKao Talk, WhatsApp, Skype, etc. Others: raise your wrist to light up the screen, call reminder, text message reminder, alarm clock reminder, shake to take pictures, mobile search, etc. Waterproof level: IP67 Charging time: 2 hours Battery life: 7~9 days Note:1. Please allow smaller sizes due to manual measurement. Please make sure you don't mind before bidding.2. Due to different monitors, colors may vary, please understand. Notice:Hello, please note your shipping address when purchasing products. If your delivery information (e.g. name, street, house number, doorbell/box without name, etc.) is incorrect, the order will not be shipped correctly. )