Using these VTech KidiGear Walkie Talkies is easy. First, put 3 AAA batteries into each device. Turn them on and pair them up using the 2.4GHz digital technology. Once paired, you can start chatting with friends within 200 meters. To use the voice changer, just press the relevant button. For sending text messages, find the text input option on the backlit screen. You can also play the four built - in multiplayer games. When using the torch, press the torch button. Remember to keep the devices away from water and high - heat places. If the battery runs out, replace it with new AAA batteries. Clean the devices with a soft, dry cloth regularly to keep them in good condition.