Use relay harness to avoid the trouble of installing aftermarket speakers. Relay kit will make installation easy! Harness allows you to choose to use existing and aftermarket speakers, while retaining your factory buttons with simple adjustment. Since most cars only have one , if you want to install an additional pair of horns, it is necessary to use relay harness kit. Relay harness kit will minimize modification and make installation super easy! Connect up to two horns easily and durably. Universal for most electric grille horns. Heavy duty, high efficiency, heat resistant, never melt Voltage: 12V Color: As shown Material: Metal + plastic Package Contents: 2 * Wiring Harness for 4 * Cable Ties Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error is +/- 1-3 cm.