Drums wearfit F1 plus color screen smart band with heart rate, blood pressure monitor smart bracelet waterproof fitness tracker with stopwatch. Note: Please refer to the manual before use. The smart band is ip67 waterproof means it can only for cold shower, washing hand, get wet in the rain, it is not recommended to use in more than 1 meter deep dive. You need to take it off when you are taking hot bath or swimming for a long time to prolong the device service life. SMS/call alert functions only work under Bluetooth connection state. Preparation: Please ensure the device is full charged for the first time. Please ensure the phone is compatible with wearfit app. System requirements: Bluetooth 4.0 enabled - android 4.4 or above, iOS 8.4 or above. Stylish design: The all new wearfit f1 plus is super lightweight fitness tracker satisfies your personalized needs. Track your workouts: Monitor your daily workout activities including steps, distance, calories and activity time. Monitor your sleep quality: The fitness tracker automatically monitor how long and how well you sleep at night, by reading all these sleep metrics you can get to know your health condition. Set alarms and notifications: Pair the fitness band with our smartphone app, you can set alarms, sedentary alert and incoming call notification. G-sensor:3-axis. Battery: 85mah rechargeable li-polymer battery, screen size: 0.96 inch, stand-by time: Up to 7 days. Weight: 24.4g.