This Suction can be used in a wide variety of situations by emergency services, paramedic units and for patient transport (AMBULANCE) because of its battery operation. This second-generation aspirator can be operated on AC line current,its own internal sealed lead acid battery or through an optional 12V power cord with cigarette lighter socket for Vehicles. This will automatically switch from AC power, AC charging, 12V operation, and battery power. No manual switches or dials to worry about. Battery indicator lights to provide status of battery condition.Oil-free Rocker piston pump with permanently lubricated bearings, which ensures quiet operation and low maintenance & 1.5 liters autoclave-able collection vessel that incorporates a safety cut-off valve. One Year warranty.