This is a Nicestuff 68899 (aka NSD-68899 or KRAM 68899) carkit-specific adapter for use with their NSD-series, EZ-series and PR-series carkit integration harnesses. This harness extends the connection of the vehicle-specific integration harness to the location of the carkit. Typically, this extension is used for an integration harness that connects to an amplifier in the rear of the vehicle, that has to route the connections back to the carkit that is located in the front of the vehicle. The extension harness features two 6pin Molex connectors on either end. When used with a Nicestuff / KRAM vehicle-specific adapter harness (see the other items in my booth for a selection of harnesses), on activation of the Mute line by the carkit, the vehicle audio will switchover to the handsfree kit. This adapter directs supply of the following connections between the vehicle-specific harness to the carkit: VBATT - constant +12V power supply Ground - chassis ground Ignition - switched +12V signal Mute - active-low trigger Mute connection Speaker (+) - differential mono audio signal from the carkit or device Speaker (-) - differential mono audio signal from the carkit or device I have a mobile electronics installation business and am selling off some excess inventory. Please feel free to send a message if you have further questions about any of my items. I am willing to ship this item internationally, but please contact me first so that accurate shipping charges can be assessed. Thanks for looking!