D300 1.54 inch IPS Screen Smart Watch, Support Tracking and Positioning & Video Call 1. Display: 1.54 inch IPS 2. Processor: ASR3603 3. Battery capacity: 650mAh 4. Frequency band: FDD: B1B2B3B5B7B8B20; WCDMA: B1B2B5B8; GSM: frequency band B2B3B5B8 5. Strap material: Environmentally friendly LDS material 6. Speaker: 609 cavity high-quality speakers 7. Camera: 300,000 pixels 8. IO interface: four-point magnetic suction 9. Working current: 280mA 10. Standby current: Mobile: 2.45mA, China Unicom: 2.52mA, Telecom: 2.24mA 11. Charging current: 300mA 12. Charging time: 2H 13. Functions: time zone calibration, sleep default manual collection and positioning, fixed upload, low battery alarm, electronic fence alarm, SOS alarm, video call, contacts, dial function, micro chat, heart rate and blood pressure monitoring, body temperature measurement, sleep monitoring , unlock password, take pictures, voice time, step counting, sedentary reminder, weather forecast, refuse to answer calls from strangers, alarm clock, remote shutdown, remote monitoring, historical track, multiple monitoring, firmware upgrade 14. IP67 dustproof and waterproof rating 15. 4G network connection 16. Only Nano card is supported 17. Watch language: Chinese, English, Russian 18. Weight: 58g 19. Dimensions: 50.5x41x16mm