DH02 1.85-inch Kids 4G Smart Watch 1and8G Video Calling SOS Children Camera Watch - Blue 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 GPSandWIFIandLBS. 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 or WCDMA or FDD or 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 1GBandROM 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 or 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: 802.11b802.11g802.11n 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 240x280 Screen type: LCD Screen manufacturing process: IPS Size: 1.85 inches Chip ICinterface type: IC: GC9307NandIVO Resolution: 240x280 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 typevoltage: polymer battery4.35V Standby current: 6mA Theoretical standby time: 100H Charging current: 300mA Charging time: 2.5H Power on or off key: power on or off function,return function SOS button: SOS,answer,hang up function Package included: 1 x Smart Watch 1 x Charging Cable 1 x English User Manual