Ball Electric Variometer plus Audio, Panel Mount 80mm

Ball electric variometer plus audio unit. Working when removed. Wiring harness and on/off switch. Audio unit extension wiring. Connects to Pitot and Static lines for total energy compensation (see photos). Doesn't require a separate Total Energy probe for compensation (i.e. avoiding "stick thermals"). As installed, it was 'T'ed off the airspeed indicator for both lines. Variometer model 101G s/n 1336 Audio unit model 405A s/n 6282