"12V dc to 230V ac Inverter, ideal for using with 220 - 240V equipment and the Acetone Vaporiser (AS011) in a mobile laboratory. Plugs directly into cigar lighter socket or can be permanently wired into the vehicle electrical circuit. There is an audible warning if the battery voltage drops too low (approx. 11V) and the unit turns off when the voltage falls below approx. 10V. Over-current protection is provided to prevent any damage"