Features: - 24 hours heart rate measurement; - Automatic recognition of nighttime sleep, identify and improve your sleep; - Multi-sports modes, professional training; - IP67 waterproof, wash your hands and swim with confidence; - Light body, and lift wrist bright screen. Specification: Compatible OS: Android 4.4 or above IOS 8.0 or above. Operating Mode: Full Touch. Watch Display Language: German. English. Italian. Spanish. French. Japanese, Russian, Portuguese. APP Supported Language: Chinese Simplified, Chinese Traditional, English, German, Russian. Japanese, French, Korean.Portuguese, Spanish, Italian. Persian. Vietnamese. Waterproof: IP67 Waterproof. 24h-Heart Rate Monitor: Support. Sleep Monitor: Support. Multi-Sport Modes: Support. More Functions: Support Alarm, Alarm Clock, Calendar, Calorie Burn Tracking, Stopwatch, Countdown. Sensor: G-sensor,Heart Rate Sensor. Screen Size: 1.65inch. Type: TFT. Resolution: 240*240pixels. Battery Capacity: 190mAh. Standby Time: About 14-25 days. Using time: About 200 hours. Charging Tme: About 1.5 hour. Charging Type: Magnetic charging. Strap Width: 34.5mm. Net Weight: About 40g. Package: 1* Smart Bracelet. 1* Charging Cable. 1* User Manual