A phone watch with built in GPS locator. It uses a standard 3G SIM card (sold separately) to send the location to a smartphone application or a special webiste, so you can see exactly where your child is, and has been. It has a colourful screen and a basic camera.
You can call your child or they can call you with the press of one button. The watch is pre-programmed with numbers they can call.
It also has fitness tracking features like a pedometer and sleep monitoring.