Replace your KT-76A or KT78A with Garmin GTX327 with special adapter - plug & play.  No wiring changes.

Replace your KT76C Transponder - existing install sleeve may need to be replaced.  No wiring changes.

Works for 14 Volt & 28 Volt systems.

Comes with with FAA 8130 Certificate & Yellow Tag.

Warranty - two weeks upon delivery.   Free shipping to lower 48 States.