We added all 7 of these switches. The 5 on the right are for the LEDs. The two on the left are for audio. One turns the toolbox mounted PolyPlanar 6x9's off and on. The other switches off the inside JL Audio JX series 4 channel amp. The inside speakers are JL Audio C2 series components along with a Kicker box loaded with a 10" CWRT woofer and a 10" passive radiator. The head unit is an Alpine CD receiver with USB and Bluetooth. This system jams!