Features: 1. Easy to connect to your cigarette lighter or battery clamp, open the switch and the hot air come out immediately. 2. The power can be adjusted according to the voltage, very useful for speeding up demisting and defrosting. 3. The heater will blow instant heat or cool air, so as to warm up / cool your car within seconds. 4. Works perfectly against fog on your windows, keeps you cool at summer and warm in the winter. 5. The heat conversion rate of ceramic alloy heater is high, and has advantage of automatic thermostat and adjust the power, automatic constant pressure, improve the circuit security. 6. Compact portable unit with fan & heat settings, ideal for in-car, camping etc.7. Comes with double heater for strong wind, but low energy loss, low noise. Specifications:Material: Aluminum alloy + plasticVoltage: 12V / 24VPower Adjustment: 150W-350W (12V), 300W-500W (24V)Size: 16.7 x 9.3cm / 6.57" x 3.66"Current: 25ARotating Speed: 2000Package Weight: 546g Package Included:1 x Car Fan Heater 1 x Car Charger 1 x Silicone Pad2 x Battery Clamps3 x Protective Tubes