Four conductor 3.5 mm male to Two conductor 3.5 mm female. 21 inches in length. This adapter is handmade and was tested on my KT5000 in my car.

Works Perfectly. You do you need to determine which of the two 3.5 MM jacks on the back of the radio is the speaker output. Refer to your user manual.

From a smoke free home.

Selling on eBay for 25 years.