MB Quart Dual-Input Accessory Plug - Black PSAP-233.44Buy!$BestBuy.comDelivery: to Redlands ReportThis MB Quart PSAP-2 dual-input accessory plug works with your MB Quart GMR-1 or GMR-2 audio system, so you can access rear USB and 3.5mm jack inputs. The waterproof design enables installation on you more→r boat or other outdoor vehicle.
