Features: Cigarette lighter holder, double hole. With a waterproof and dustproof cover. High current resistance, high temperature resistance, wear resistance. It can be used together with car charger to charge mobile phone, GPS, car audio, car MP3 power, car vacuum cleaner power, car tire inflatable power, etc. Because of the different structure, can not be used in cigarette lighter. Wiring instructions: the red wire is connected to the positive power supply, and the black wire to the negative power supply. Easy to install. Specification: 100% brand new with high quality Color: Black Size: 85 x 45.5 x 55.5 mm Working voltage: DC 12V Package Included: 1 x car cigarette lighter socket Note: The colors may be a little difference for the different monitor display. Please check as much as possible to make sure the item is the one that you need. Please allow 0.5-1 inch difference due to manual measurement.(1inch=2.54cm)