Features: 100% brand new and high quality. Waterproof,shockproof design. Aluminum outer case material, long term stable and reliable. Thin, small size, high efficiency and easy to install. Purpose: car alarms, radio, intercom, electric motors, audio, navigation, surveillance, LED car display, air conditioning, fans, solar energy, DVD, LED lights, motors, pumps, and industrial electrical equipment, etc. Input wire color : (+)Red, (-)Black. Output wire color: (+)Yellow, (-)Black. Note: Please be remind to make sure wiring carefully & correctly. No wiring reverse short-circuit protection for this device. .