1. Appearance material Front case: PC, rear case: ABS+PC, wristband: environmental protection TPE. 2. Battery type: polymer lithium battery, battery capacity 90mAh. 3. Charging time: about 2h, battery life: 5-10 days, standby time: 20-30 days. 4. Compatible systems: Android 4.4 and above, iOS 8.2 and above. 5. Features: color screen, heart rate, blood pressure, multi-sports mode, weather forecast. 6. APP support languages: Russian, German, Italian, Japanese, French, Simplified Chinese, Traditional Chinese, Portuguese, Spanish, Arabic, Korean. 7. Main functions: multi-sports mode, weather forecast, full font, HD 0.96 color screen, dynamic 3D interface UI, heart rate monitoring, blood pressure monitoring, step counting, calories, distance, sleep monitoring, sports mode, call reminder, alarm reminder, Raise your hand to screen, social sharing (WeChat, QQ, Facebook, Twitter) and other shake photos, two-way search.