Screen size: 1.85 inches Bluetooth version: BLE5.1 Battery capacity: 280mAh Working time: standby 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 Band, H Band Lite Adaptive system: Android 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, and sleep management, you can gain a deeper understanding of your physical and mental health Bluetooth call: Use a high fidelity waterproof speaker, Bluetooth hands-free call, display high-definition original sound, whether it's sports or driving, press the key to answer, and free your hand. 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, and care more about your heart health Sleep monitoring: Accurately monitor your different sleep stages, including deep sleep/light sleep/night wakefulness, sleep breathing quality, and big data analysis, to score your sleep quality. Evaluate sleep quality scientifically and effectively improve sleep. Package Included: 1 * Smart Watch 1 * Instructions 1 * Charger