Brand WiWU Style Fashion Model SW02 Screen Resolution 400*400 Color Black,Silver Working time 8-10 days Features Waterproof IPX68 Strap Length: 220mm Screen Resolution: 400*400 Screen material: Tempered glass Bluetooth: 5.0+3.0 Screen Size: 1.39 IPS Battery:380mAh Working time: 8-10 days, standby time 60 days Wireless charging, 4H This smart watch fitness tracker supports 15+ sports modes such as running , walking , bicycle, yoga and more. Our smartwatchs can easily monitor your heart rate, sleep state in real time via our app, and provide comprehensive analysis of your sleep quality to help you develop a healthier lifestyle.