4G video chat with high-definition resolution, provides a smooth video call experience for parents and kids at anytime and anywhere, more convenient and vivid communication Real-time location by GPS+WIFI+LBS. Whatever the children are indoor or outdoor, parents can get the kid's real-time location from APP on the smartphone One click to ask for help by pressing the SOS button for more than 3 seconds, the watch will circularly call family numbers presented in the APP and send messages to the guardians Smart Android system children's watch with stylish appearance Specification: Operating system: Android 8.1 Chip platform: System data type: 32 bit Main chip model: SL8521E Main frequency: 1.2GHz Architecture: Dual-core ARM CortexTM A7MP processor Number of cores: Dual core GSM/WCDMA/FDD/TDD band: GSM: B3 B8 WCDMA: B1 B8 TDD: B38 B39 B40 B41 FDD: B1 B3 B5 B8 Data rate: 2G speed: GPRS 3G speed: WCDMA 4G speed: CAT4 Call method: VOLTE: support Video call: supported GSM call: support Memory: RAM 1GB+ROM 8GB LBS base station positioning: support LBS base station positioning accuracy: 100-1000M GPS positioning: Chip model: Integrated inside the main chip GPS signal: L1,1575.42MHz C/A code Number of GPS channels: 22 channels GPS chip receiving sensitivity: tracking:-165dBm, capturing:-148dBm GPS positioning accuracy: 5-15 meters GPS antenna: LDS antenna AGPS: Support AGPS positioning time: cold start 30 seconds WIFI positioning: WIFI positioning: supported WIFI chip model: integrated inside the main chip WIFI standard: 802.11b\802.11g\802.11n WIFI hotspot: not supported WIFI data transmission function: supported (disconnect the network after turning off the screen) Display: Fitting method: OGS full fit Display: 1.85 inches 240*280 Screen type: LCD Screen manufacturing process: IPS Size: 1.85 inches Chip IC\interface type: IC: GC9307N+IVO Resolution: 240*280 Viewing angle: full view Touchscreen: Touch type: capacitive Production process: COB Panel shape: 2.5D Panel thickness: 1.8mm Anti-fingerprint oil: Yes Number of touch points: single point Camera: Front camera pixels: 30w Lens type: CMOS Proactive IC: SP0A19 Battery: Battery core specification: 652834 Battery capacity: 900mAh Cell type\voltage: polymer battery\4.35V Standby current: 6mA Theoretical standby time: 100H Charging current: 300mA Charging time: 2.5H Power on/off key: power on/off function, return function SOS button: SOS, answer, hang up function