Communications, Navigation Indicator and Safety Aid built into one transceiver. The Aviator Pilot II combines Yaesu's legendary Mil-Std construction and sleek styling with the most advanced features ever offered in a hand held airband transceiver. Available in 2 versions (regular and SU) The SU version includes the SU-1 barometric pressure sensor which will allow the Pilot II to measure altitude and calculate density altitude. Features: direct frequency entry from well lit keypad, temperature measuring feature, 150 memory channels (with 8 character alpha numeric display) One touch squelch control, receive battery saver, NOAA weather band receive and more. Options include FBA-25 Alkaline battery case for emergency back up.