Waterproof means that the device is not adversely affected by contact with water and can withstand water contact without becoming damaged.
Tablets
A tablet computer, commonly shortened to tablet, is a mobile device, typically with a mobile operating system and touchscreen display processing circuitry, and a rechargeable battery in a single, thin and flat package.
An IP68 rating means a device can survive against dust and up to 1.5 metres of water for 30 minutes. IP67: Offers a similar level of protection against dust as IP68. The main functions of the kids phone watch include Real Time GPS Position, phone call, video call, SOS Call, Voice Chat, Pedometer, Historical Route etc.
Jack or analogue cinch cables already provide the amplified sound signal. Via USB, so-called frames or data packets are transferred from the hard disk to the USB sound card and then converted and amplified in the speaker.