The GSA-023 is based on a large single needle gauge is and has the proper faceplate to show VSI from -3000 to 0 to +3000 feet/min.
The steppermotor gives very smooth needle movements.
height 83 mm
width 83 mm
depth 27 mm
weight 200 gr
mounting 4 screws
power= 5v/12v (included within the flatcable, so only a single connection to the interface is required!)
lights= 2 LED
type daisy chain, 10 pin connector on flat cable (10 wires flatcable)