Compatable with alll winger electronics, sport dog, dogtra, garmin, tritronics. This is the top of the line Hitec analog servo with karbonite gears and ball bearing shaft that comes in all Slingers. This servo has been discontinued due to switching to a metal geared servo.  If you still want this servo it is the Hitec 485 HB and can be purchased from servo city but it has to be modified so call for instructions.