Description:Description:Length: 22cmWidth: 4cmThickness: 1.5cmApplicable people: For childrenApplicable platform: For Android and IOS platformScreen size: 1.44 inchWays to wear: WristbandInterface: USB 2.0Savephone no.: 10 numbers( S4Smart Children Watch can dial to any phonenumber, but only the saved phone numbercan call theS4Smart ChildrenWatch.)Function:Voice chat, camera, puzzle game, energy-saving flashlight, simplewaterproof, time display, card phonecall, phone positioningSpecialfeatures: Support a key to switch the screen; APP can transfer thelanguages, support multiple languages; a key SOS emergency call (longpress SOS key for 3 seconds, the watch screen will display SOS, and thenenter into the alarm state);low-radiation;eyeprotection;environmental strap.Power supply: Lithium-ion polymer gel battery standard 400mAH (built-in)Input voltage: DC 5V 2AOutput voltage: 3.7VCharging time: 3 hoursStandby time: 2-3 daysSIM: Micro SIM cardNetworks standard: GSMNetworks frequency: GSM850 / 900/1800 / 1900MHZLocation: Location Based Service (LBS)Photo resolution: 240x240Network: 2GSpecifications:Kids Smart Watch S4 Waterproof SIM Card Dial SOS Camera Children Smart watch for Baby safe Android IOS Phones LocatorPackage Included:1 x Child Watch1 x User Manual1 x Charge Cable