Oscillating electric fan operates from your 12 volt cigarette lighter car accessory plug. Koolatron electric fan for cars, trucks and motor homes cools you off while you're waiting for your spouse or the air conditioning to cool you off. Save gas by shutting off your engine yet stay cooler. The 12V Oscillating Auto Fan by Koolatron plugs directly into your vehicle's cigarette lighter power socket. No batteries required. An ideal ventilation fan for cars, trucks, buses, off road equipment, boats and other recreational vehicles. Three position switch for high speed, low speed or off.