This is a radio wire conversion coupler needed when installing aftermarket navigation systems, decks, etc. in Honda cars. The shape is square. We can accommodate multiple requests, so please feel free to contact us. Navigation Audio Coupler *Used item* If an electro tap was originally attached, it has been removed for sale, and there may be exposed wiring where the vinyl has been stripped. We recommend repairing it with vinyl tape or similar before use. *Shipped via non-standard mail, so there is no tracking number and it will take some time for the product to arrive.* (Delivery is only available on weekdays)