The Happy Handsfree allows you to take a call whilst not putting the phone to your ear (hence reducing exposure of the head to radiation).
It is situated on the user’s wrist and features a microphone and loudspeaker. The purpose of the loudspeaker is so the child can hear the conversation without having to put the device to close to their head.
The primary reason for this is to reduce mobile phone radiation to the child’s brain.
A answer/end call button and volume controls are also incorporated into the device, with Bluetooth allowing it to connect to the mobile.