1. Chip: MTK2503A-ARM7 2. Main frequency: 1.1GHZ 3. Memory: 128M+64M 4. Frequency band: GSM850/GSM900/DCS1800/PCS1900 5. Charging: Clip-on charging 6. Case: zinc alloy, PC+glass fiber, strap: silicone strap, replaceable 7. Touch screen: capacitive screen G+F 8. Main screen: 1.3 HD 240*240 full circle screen 9. Dual-mode Bluetooth 3.0+4.0, Bluetooth effective distance is 8-10 meters 10. Battery specification: 380MAH high capacity polymer 11. SIM card: Nano SIM card 12. Battery removal: not supported 13. Watch built-in languages: Chinese, English, French, Spanish, Polish, Portuguese, Italian, Dutch, Turkish, Russian, German 14. APP supported languages: English/Chinese/French/Spanish/Italian/Hungarian/Portuguese/Romanian/Ukrainian/Russian/Polish/Korean/Indonesian/Dutch/Danish/Germany/Swedish /Tukish/Finnish/Czech/Japanese/Slovak/ (support for adding more languages) 15. APP name: SMART-TIME 16. IP67 waterproof 17. Support system: IOS 8.0 or above, Android 4.4 or above 18. Use time: 2 days 19. Standby time: 4 days 20. Function: phone/phone book/dial/Bluetooth call, GPS motion track, message push/social media information reminder, alarm clock, camera control, Bluetooth music player/microphone/speaker/synchronization with mobile music player, anti-lost reminder, Real-time weather, calculator/timer/stopwatch, raise your hand to brighten the screen, music player, find mobile phone, sedentary reminder, heart rate monitoring, blood pressure monitoring, support multiple sports modes, etc. 21. The total length of the watch: 299mm, the length of a single strap: 221mm, the size: 49x49x15mm 22. Packing list: 1 watch + 1 screwdriver + 1 manual (English/Chinese/Russian/Germany/Spain/Portugal)