Avionics unit with Funkwerk VHF radio (8.33 kHz channel spacing) and Trig TT21 transponder. Power take off socket for GPS or laptop. Aluminium case, Lindstrand cordura bag with pockets for spares and strap fixing loops to mount inside basket. Separate battery pack, easily removable for charging, good for around 7 hours of continuous use of radio and transponder. Comes with charger and battery. Antennas etc. not included.