Replicates factory warning chimes & provides a databus generated 12V accessory power output that is fully compatible with the GM(R) RAP system Keeps the radio powered after key-off; Issues data commands that maintain a health system status to other vehicles systems; Retains all warning chimes including backup chimes, memory seats, low fuel, door/hatch ajar & others; Includes +12V accessory wire; Retains RAP system when key is turned off--radio stays on for approximately 10 min or until the door is opened; Supplied wire harness to connect aftermarket stereo to factory speakers; Will work in vehicle that has the factory Bose(R) amp removed or bypassed--custom wiring is required; Buzzer is built into the interface; With navigation outputs for select Volkswagen(R)