Specification： Brand: NORTH EDGE Model: NL01 APP: Da Fit Display: 1.3 inch IPS HD screen Square screen Single touch Watch diameter: 44.7mm Strap length: 150mm-210mm Battery: 200 mAh Life time 7-10 days Standby time 30 days Connection type: Bluetooth, compatible for all phones Function： Heart Rate monitor Blood pressure Blood oxygen Multi-sport mode: Walking, running, cycling, badminton, skipping rope, basketball, football Sleep Motioning Sedentary Reminder Weather Alarm clock Stopwatch Countdown music control Remote camera Message reminder Call reminder Call rejection Waterproof: IP67 Warning: This watch is IP67 Waterproof，Swimming and bathing are not supported, But hand washing , washing dishes, rain, no need to worry. Friendly reminder: When you receive the watch, please download the APP: (Da Fit ) first. Search watch Bluetooth in APP. When the watch is connected to the phone, the time of the watch will automatically synchronize with the time of the phone. If there are any problems during the connection, please feel free to contact our customer service. Thank you! What's in the box: 1 X Watch 1 X Manual 1 X Charger 1 X Warranty card