Perfect Design- These switches are designed to connect and disconnect DC12V 20A electrical circuit at will, SPST ON-OFF control, 2 poles (on/off) design, 3rd poles with LED to connect to ground.Fluorescent lights will be on when the switch is turned onSafety Protection - This car switch uses copper-plated silver contacts, has good electrical conductivity, and uses high-quality materials and flame-retardant housing for high safetyEasy Installation- The yellow pin for light, the middle pin for negative (DC) or zero (AC) line, the rest pin for your equipment.Just need a 20mm hole if inserting.The small on/off switch comes with a keyhole slot to prevent unwanted rotation.Widely Used- These LED rocker switches are widely used for kinds of electrical products, cars, boats, household appliances, communication devices, measuring instruments, gas water heaters and light decoration, etc.5 Random Colors- The 12V round switch set comes with 5 random colors, total is 10 pieces.