Profile: Automated Beverage Dispensers distribute the Headmaster Beer Pump. It does not require any CO2. The working is as follows, a patented pump design with reliable electric motor precisely regulates the pressure in any standard domestic beer keg. Just tap the keg like you normally would. Then insert the power cord into the beer glass cover and plug it into any standard AC outlet. Push the pressure relief button and listen for the automatic pump to start. Then just press the tap nozzle and let it do its work. An optional battery pack allows you to pump beer for up to four hours without electricity and without recharging.