LT21 1.4-Inch 4G Global Full Network IP67 Waterproof WIFI Children Smart Watch 1. Operating system: Android 8.1 2. CPU solution: Spreadtrum SC8521E, 1.2GHz dual-core ARM CortexTM A7MP 3. Screen: 1.4-inch IPS touch screen, 240 x 240 pixels 4. Camera: 0.3MP pixels (optional 2.0MP) 5. GPS: SC8521E, L1, 1575.42MHz CA encoder, 22CH 6. GPS accuracy: 5-15m 7. WIFI accuracy: 30-50m 8. LBS accuracy: more than 100m 9. WIFI: wireless 802.11 bgn 10. Video call: through APP 11. Bluetooth version: 4.2 12. Memory: RAM: 2GB; ROM: 4G 13. Positioning: GPS, AGPS, LBS, WIFI 14. 2G network: G8MB2358 15. 3G network: WCDMA B1258 16. 4G network: FDD-LTE: B1 B2 B3 B4 B5 B7 B8 B12(17)B20 B28A (or: B1B3 B5 B7 B8 B38 B39 B40 B41) 17. SIM card: Nano SIM card 18. Call: 3 S0S + 15 phone numbers 19. SOS: Supported 20. Gsensor: Supported (three-axis) 21. Remote monitoring: Supported 22. Other functions: electronic fence (GE0), history tracking, alarm clock, watch search, phone book, working mode, remote watch shutdown, support Android and IOS APP 23. Battery capacity: 650mAh lithium battery, 663032 24. Waterproof grade: IP67 25. Supported languages: Simplified Chinese, Traditional Chinese, Japanese, English, German, French, Spanish, Italian, Turkish, Russian, Portuguese, Polish, Dutch, Thai, Indonesian, Malay, Hungarian, Danish, Slovak, Swedish, Vietnamese, Turkish, Greek, Ukrainian, Hebrew, Arabic 26. Dimensions: 57 x 44 x 16mm 27. Net weight: 54g