Features: Function:Call, call reminder, music, calories, sedentary reminder.Heart rate and sleep monitoring, step counter, alarm clock, etc. 2 in 1 design,smart wristband and bluetooth earphone.One Device,two function. Stylish appearance, fine workmanship, exquisite and cool. Lightweight, easy to carry.Easy to use, perfect for running and outdoor sports. OLED big screen,the text is clear,high recognition. Notice: Actual color may be slightly different from the image due to different monitor and light effect Please allow 1-3cm deviation due to manual measurement Specification: Waterproof rating: IP67 Product screen: 0.96 OLED screen Resolution: 64x128 Working hours: 96 hours Standby duration: 20 days or more Storage: 256K Bluetooth: Bluetooth 4.1 Product model: Y3 Product material: plastic plating Touching method: single touching Call duration: 4.5 hours Charging time: 2 hours Battery: 80 mAh Matching system :for iOS and for Android Interface USB charging (MOS tube charging; 5V 0.01A-0