Features 1. Heart rate measurement, long-lasting battery life, huge number of online dials 2. Multi-language menu display 3. Intelligent power management module, ultra-long standby 4. Precision craftsmanship, technology and fashion, concentrated in the wrist Parameters 1. Compatible platform: ANDROID,iOS 2. Screen size: 1.44 inches 5. Wearing style: wristband 6. Power source: USB rechargeable / built-in lithium battery 7. Battery capacity: 90MAH 8. Material: ABS+PC plastic case 9. Wristband material: TPU strap 10. Connection method: Bluetooth 11. Functions: waterproof, photo, pedometer, remote control selfie, health monitoring, information push, sleep analysis, heart rate monitoring, smart reminder, sleep monitoring, blood oxygen detection, sedentary reminder 12. Operation mode: Single touch screen 13. Interface: USB 3.0 14. Waterproof level: life waterproof 15. Packing list: bracelet, magnetic charging cable, manual 16. Size: 42x38x11mm 17. Weight: 19.5g