D300 1.54 inch IPS Screen Smart Watch, Support Tracking and Positioning & 4G Video Call 1. Display: 1.54-inch IPS 2. Processor: ASR3603 3. Battery capacity: 650mAh 4. Frequency band: FDD: B1B2B3B5B7B8B20; WCDMA: B1B2B5B8; GSM: Band B2B3B5B8 5. Strap material: environmental protection LDS material 6. Speaker: 609 cavity high quality speaker 7. Camera: 0.3 megapixel 8. IO interface: four-point magnetic suction type 9. Operating current: 280mA 10. Standby current: Mobile: 2.45mA, Unicom: 2.52mA, Telecom: 2.24mA 11. Charging current: 300mA 12. Charging time: 2H 13. Functions: time zone calibration, hibernation default manual acquisition positioning, fixed upload, low battery alarm, electronic fence alarm, SOS alarm, video phone, contacts, dialing function, micro chat, heart rate and blood pressure monitoring, sleep monitoring, unlock password, photo, voice time, pedometer, sedentary reminder, weather forecast, refuse to answer strangers' calls, alarm clock, remote shutdown, remote monitoring, history track, multiple monitoring, firmware upgrade 14. IP67 dustproof and waterproof rating 15. 4G full network connection 16. Only support Nano card 17. Support languages: Chinese, English, Spanish, German, Turkish, Russian, French, Italian, Dutch, Polish, Czech, Hungarian, Slovak 18. Weight: about 58g 19. Size: about 50.5 x 41 x 16mm