Astro 110 Plus Kids smart watch use the top tracking technology to help you locate the child's geographical location precisely.Through the SOS technology, just set a number, your kids can call and send alarm messages to parent’s phone number.Through Geo-Fence alarm protect your kids in their activity are, once the child out of the preset area will trigger the alarm and notify you through the app.FeaturesDual-Way Phone CallLarge Color Touch Screen 1.22 inchGPRS Real-time positioning, monitoring, trackingReal Time PositioningPedometerSOS Emergency AlarmRemote ShutdownGeo-FenceSafe Zone SettingLow Battery AlarmWatch Take Off AlarmFast LocationRemote MonitoringMobile App or Computer service platform dual controlAndroid and iPhone SupportEasy Sim InstallSilicon Hand StrapAdditional Silicon Hand StrapSpecificationsGSM Frequency: Quad band 850/900/1800/1900MHz Quad BandSpeed Accuracy: 0.1m/secBluetooth Version: 4.0Screen Size: 1.22-inch color touch screenBattery: 3.7V 400mAh lithium polymer batteryStandby Time: 3 daysTalk Time: 3 hoursSIM Card: Micro Compatible Devices: Android and iOS devicesWeight: 35.1gMaximum Altitude: 18000mGPS Channel: 22GPS Sensitivity: Tracking: -165dBm, Capture: -148dBmGPS Position Accuracy: 5-15m (2D RM)LBS Position Accuracy: 100-1000mWorking temperature: -20~70℃Humidity: 5% ~ 95% RHDimension: 33.6mm*30.5mm*12.8mm