Technical Specifications: Dimensions (without rotary knob): 3.27" x 3.27" x 1.02" -- 83 x 83 x 26 mm easy-to-install into 80mm standard cutout. Input Voltage: 9 to 32V DC Interfaces: RS232 FLARM Protocol and RS232 GARMIN TIS   In the box: ATD-80 main unit Panel screws Standard RJ45 cable (FLARM/IGC compatible pinout) Documentation