Just plug in the Pilot Cell phone adapter into your aircraft standard headset and microphone jacks, then plug your headset and cellphone into the Cell Phone adapter. Then you you will have simultaneous use of your cellphone and your aircraft radio. In the event of a radio failure, the Pilot Cell Phone adapter provides an additional measure of safety. Alternatively you can use this as a portable tape recorder in place of your cellphone and use it as a cockpit recorder. You can also listen to your personal stereo ipod mp3 player in place of your cellphone. Designed for easy installation and portability, you can stow the Pilot Cell Phone adapter in your flight bag, always ready to work. The Pilot Cell Phone adapter allows cellular communication on the ground. Uses one 9 Volt battery (not included). This Cell Phone adapter works with any headset and any phone with a 2.5mm jack, a base unit may be required, these can be purchased from a mobile phone shop.