Description: Screen size: 1.85 inches Bluetooth version: BLE5.1 Battery capacity: 280mAh Working time: stby for 20 days, use for about 5 days. Charging for 2 hours Charging method: magnetic suction line charging Waterproof grade: IP67 APP: APP QR code H B, H B Lite Adaptive system: roid 5.0 or above, only Bluetooth 4.0 Supported languages of the bracelet: Russian, Indonesian, German, Italian, Czech, Japanese, French, Polish, Simplified Chinese, Traditional Chinese, English, Portuguese, Spanish, Arabic, Korean, Dutch, Hindi APP display language: English, Russian, Indonesian, German, Italian, Czech, Japanese, French, Polish, Simplified Chinese, Traditional Chinese, English, Portuguese, Spanish, Arabic, Korean The language of the bracelet push: English, German, French, Italian, Greek, Latin, Spanish, Portuguese, Romanian, Polish, Russian, Ukrainian, Lusenian, Belarusian, Bulgarian, Serbian, Maxitan, Croatian, Bosnian, Hindi, Sanskrit, Nepalese, Cambodian, Vietnamese, Lao, Persian, Kurdish Pashto, Punjabi, Turkic, Berber, Malay, Turkish Specifications: Integrating more than 10 health management functions such as respiratory training, heart rate monitoring, blood oxygen monitoring, sleep management, you can gain a deeper understing of your physical mental health Bluetooth call: Use a high fidelity waterproof speaker, Bluetooth hs-free call, display high-definition original sound, whether it's sports or driving, press the key to answer, free your h. Make communication more free 24-hour heart rate monitoring: Support 24-hour monitoring of your heart rate, help you timely detect abnormal heart rate beats in your body, care more about your heart health Sleep monitoring: Accurately monitor your different sleep stages, including deep sleep or light sleep or night wakefulness, sleep breathing quality, big data analysis, to score your sleep quality. Evaluate sleep quality scientifically effectively improve sleep. Package Included: 1 Smart Watch 1 Instructions 1 Charger