Video calling: 4G video chat with high-definition resolution, provide a smooth video call experience for parents and kids at anytime and anywhere, more convenient and vivid communication 4G Network: 4G network offer stronger signal, higher speed, wider coverage and more stable communication. Support SIM card with network GSM, WCDMA, LTE LBS/GPS/WIFI Multi Precise Location: Whatever the children are indoor or outdoor, parents can be got kids real-time location from APP on smartphone. Also can take the calling. Supporting history track SOS calling: one click to ask for help by pressing the SOS button for more than 5 seconds, watch will circularly call family numbers which were presented in the APP and send message to the Guardians HD camera: children can easy capture beautiful pictures with 2.0M Pixels camera, record the wonderful moment Other functions:electronic fence (GEO), IP67 waterproof, alarm clock, find watch, phone book, working mode, remote shutdown watch, support APP for Android and IOS smartphone Specifications: Screen1.4inch IPS Touch screen, Pixel 240x240OSAndroid4.4SolutionSpreadtrum SC8521E, 1.2GHz Dual-core ARM CortexTM A7MPGPSSC8521E, L1,1575.42MHz C/A code, 22CHGPS Accuracy5-15mWifi Accuracy30-50mLBS Accuracy100m aboveWiFiWireless 802.11 b/g/nVideo CallBy APP or VOLTEMemoryRAM: 512MB; ROM: 4GLocationGPS,AGPS,LBS,WIFI2G NetworkGSM B2/3/5/83G NetworkOption1: WCDMA B1/2/5Option 2: WCDMA B1,2,84G LTE NetworkOption 1: B1 B2 B3 B4 B5 B7 B12 B13 B17 (or B1 B3 B5 B7 B20 B28A) Option 2: B1 B3 B7 B8 B20 B28ASIM cardNano SIM cardCalling3 SOS + 15 phone numberSOSSupportG-sensorSupport (in three axis)Remote monitoringSupportCamera2MP pixelsWaterproof levelIP67BatteryLithium battery 800mAh, 643029Dimension482 x 42.2 x 16.4mm Package included: 1 x Smart Watch 1 x Box Charger Cable (Pogo Pin) 1 x Metal Clip 1 x Screwdriver 1 x English and Chinese Manual Other items not included