Wireless PTT for trikes & other aircraft.Attaches to the ‘A. frame of any trike as per a standard cabled PTT – but without any wires attached.There is a small receiver unit to connect to the PTT connection of the aircraft radio interface.The PTT and receiver then replace the need for a cabled PTT.There is a small 12 volt battery in the PTT unit. Battery life is typically 2-4 years, depending on amount of use.