With 4G SIM Card Smart Watch for Child 4G Smartwatch with WiFi Tracker, Voice Chat, Video Call, and Monitor for Boys and Kids Features: 1. Accurate Location We use LBS base station location for accurate positioning. 2. Safe Incoming Calls After setting SOS and family numbers, contacts, and phone numbers in the app, kids can only receive calls from those designated numbersnot from strangers! Kids can press the SOS or a familiar number button to call you. 3. Walkie Talkie Use this function to have voice conversations between the smartwatch and the app. Send voice messages from the app or record and send messages from the watch to the phones app. 4. Reward System Select the number of hearts on the app and click confirm; the information will be sent to the watch. You can check related data through the app. 5. History Route Check your child's historical activity routes by selecting a time period. 7. Find the Watch If the watch is not nearby, send this command and the watch will ring for 1 minute so you can locate it easily. Press any button to stop the ringer. 8. Message Alerts a. Low-battery reminder b. SOS reminder 9. Remote Shut Down Remotely control and shut down the smartwatch using the app. 11. Quick Learning Kids can play sample math games on the watch. 12. Flashlight Built-in LED flashlight for convenience when needed. Specifications: Frequency: GSM 850/900/1800/1900MHz Body Memory: 32MB RAM, 32MB ROM Applicable System: Compatible with iOS and Android Screen Size: 1.44 inches Waterproof Level: IP67 Wireless Distance: Unlimited distance Operation Mode: Touch screen and button Tracker Model: LBS base station tracker GSM Positioning Accuracy: 50200 meters Speed Accuracy: 0.1 m/s