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Spec: Item Type: Smart Bracelet Material: ABS, PC, Aluminum Alloy, Silicone Weight: Approx. 128.00g / 4.52oz Applicable People: Women, Men, Toddlers, Neutral, Teenagers, Couples, Adults, Senior, Others Operation Method: Button Type Band Width 20mm / 0.8in Sensing Area Size: Approx. 45.6x26.4x10.8mm / 1.8x1.0x0.4in Total Length: 260mm / 10.2in Water Proof: IP68 Bluetooth​: BLE 5.0, BT 3.0 Battery: Lithium Ion Battery YQ401523 145mAh Usage Time: 30 Days Standby Time: 120 Days Charging Time: 1.5 Hours Charging Method: Magnetic Charging ROM+RAM: RAM 128KB, ROM 512KB Flash: 128M Mobile Phone System Compatibility: for IOS 9.0, for Android 6.0 APP Language: English, Arabic, Danish, German, Spanish, Finnish, French, Italian, Japanese, Korean, Dutch, Norwegian, Polish, Portuguese, Russian, Swedish, Thai, Ukrainian, Chinese, Traditional Chinese Watch Language: APP Display Clock, Date Display: APP Display OTA Upgrade: Support Sleep Observing: Full Day Sleep Observing Step Measurement: Support Calorie Consumption: Support Stress Test: Support Body Temperature Measurement: Support Weather Forecast: View on APP Activity Records: View on APP Sexual Cycle: Support Restore Factory Settings: APP Operating Firmware Information: View on APP Sports Modes: 100+ Sports Modes, Use on APP Working Temperature: -20℃ to 60℃ Charging Temperature: 0℃ to 40℃ Working Humidity: 10%-90%RH (Non Condensing) Storage Temperature: -30℃ to 70℃ Storage Humidity: 5%-90%RH (Non Condensing) Package List: 1 x Smart Bracelet 1 x Charger 1 x User Manual