The The Raxus Car Alarm This portable car alarm requires no installation, yet provides complete protection for your automobile. You simply hang the alarm over the driver's side window and plug the adapter into your cigarette lighter. A powerful alarm will sound outside the car if the car is moved, a window is broken, or a door is opened. The alarm is highly visible making it a great deterrent. Arms and disarms by remote control. The remote also has a panic feature for additional personal security. May be powered by the cigarette lighter adapter (included) or six "AA" batteries (not included).