Description: Description: Length: 22cm Width: 4cm Thickness: 1.5cm Applicable people: For children Applicable platform: For Android and IOS platform Screen size: 1.44 inch Ways to wear: Wristband Interface: USB 2.0 Save phone no.: 10 numbers( S4Smart Children Watch can dial to any phone number, but only the saved phone numbercan call theS4Smart Children Watch.) Function: Voice chat, camera, puzzle game, energy-saving flashlight, simple waterproof, time display, card phonecall, phone positioning Special features: Support a key to switch the screen; APP can transfer the languages, support multiple languages; a key SOS emergency call (long press SOS key for 3 seconds, the watch screen will display SOS, and then enter into the alarm state);low-radiation;eye protection;environmental strap. Power supply: Lithium-ion polymer gel battery standard 400mAH (built-in) Input voltage: DC 5V 2A Output voltage: 3.7V Charging time: 3 hours Standby time: 2-3 days SIM: Micro SIM card Networks standard: GSM Networks frequency: GSM850 / 900/1800 / 1900MHZ Location: Location Based Service (LBS) Photo resolution: 240x240 Network: 2G Specifications: Kids Smart Watch S4 Waterproof SIM Card Dial SOS Camera Children Smart watch for Baby safe Android IOS Phones Locator Package Included: 1 x Child Watch 1 x User Manual 1 x Charge Cable