T1 TWS Headphones Smart Watch, 1.8 inch Square Screen, Support Bluetooth Call Heart Rate Specifications 1. Bluetooth Version: Mobile Bluetooth 5.0, Data Storage Bluetooth 4.0 2. Charging Case Battery Capacity: 240mAh Li-Polymer 3. Earbuds Battery Capacity: 25mAh Li-Polymer 4. Charging Case Function: Charges both earbuds for two cycles 5. Standby Time: 8-12 days 6. Music Playback Time: 3.5 hours 7. Charging Time: 1-2 hours 8. Main Chipset: AB5682B (Bluesun) 9. TWS Chipset: AB5636H (Bluesun) 10. Heart Rate Sensor: Tianyi Hexin HX3918H 11. Screen Size: 1.80 inches 12. Screen Resolution: 240 x 284 pixels 13. Dust and Water Resistance: IP67 14. Memory: 256KB RAM + 1MB Flash 15. Control: Touchscreen 16. Vibration: Real-time vibration alert 17. Main Housing Material: Glass lens + Plastic 18. Compatible Systems: Android 4.4 and above; iOS 8.0 and above 19. App: Fere Fit 20. Net Weight: 26.1g 21. Package Includes: Charging cable, instruction manual, complete device Functional Specifications 1. Features: Bluetooth calling, full touchscreen, heart rate, shake to take photos, call notificationrejection, message storage, multi-sport modes, weather 2. Main Functions: Multi-language, message notifications, alarm clock, find your wristband, health monitoring, exercise log (pedometer, calories burned, mileage) 3. Charging Method: Magnetic charging 4. Message Notifications: SMS, QQ, WeChat, Skype, Facebook, Twitter, WhatsApp, Line, Viber On-Ear Button Functions 1. 4-click button before pairing: Switch between Chinese and English notification tones; 2. Long press for 2 seconds to power on, long press for 1.5 seconds to reject a call, long press for 3 seconds to power off; 3. Double-tap the button: Answerend a call; 4. 4-tap the button: Wake up SIRI; 5. Double-tap the button: Playpause; 6. Triple-tap the left earbud button: Previous song; triple-tap the right earbud button: Next song; 7. To reset the earbuds to factory settings: Disconnect the earbuds from your