COMPATIBLE WITH MOST STANDARD CIGARETTE LIGHTER PORTS. GLOWS WHEN PLUGGED INTO PORT. INPUT: 12-24 VOLTS. OUTPUT: 5 VOLTS/1 AMP. DISCONNECTS FROM KEYS FOR EASY USE. OPEN STRAP TO ADD KEYS. CORDS NOT INCLUDED. COMPLIES WITH PROP 65. 4 3/4" W X 1" H