PR1-2 1.24 inch IP68 Waterproof Sport Smart Watch, Support Bluetooth Sleep Monitor Call Reminder 1. Working voltage: 3V 2. The buzzer sound: 40-50dB 3. Luminous brightness: 5.0lm 4. Bluetooth: BT4.0 5. Display: FSTN full view 6. Luminescence: EL cold light film 7. Case material: ABS high-hard plastic 8. Button material: ABS 9. Strap material: high toughness TPU 10. Buckle material: 304L stainless steel 11. Material of bottom cover: 304L stainless steel 12. Head size: 58x54x15mm 13. Display diameter: 39mm 14. Stand-alone weight: 62g 15. Packing weight: 118g 16. Strap width: 26mm 17. Bluetooth effective distance: 8-10m (open environment) Product Features Shutdown sleep 1224 hour switch EL Luminous Dial 50 meters waterproof IP68 Bluetooth reminder: incoming call SMS social chat mail Pedometer: calories miles steps Sports Management: Goal Setting Complete Ratio Sports Record and Analysis-APP Remote photography: shake the watch, the phone automatically takes pictures Bluetooth synchronization: the watch automatically synchronizes the phone time after pairing Smart alarm: the phone sets the alarm to synchronize with the watch Stopwatch function (0 - 9 hours 59 minutes 59 seconds 99) Time function: hour, minute, second, year (2000-2099), month, day, AM PM APP language: change with the language of the mobile phone system