Universal Stanley FAT MAX compressor with preselector switch for 2 operating modes; e.g. for tyres/balls (high pressure/low volume) or for air mattresses (low pressure/high volume). for air mattresses (low pressure/high volume) as well as additional pump-down mode; user-friendly accessory storage on the unit; automatic switch-off when the preselected pressure is reached; easy to transport thanks to low weight, compact product dimensions and high-quality carrying handle; High and efficient compressor performance; Option to select high or low volume pressure pumping system; Flexible choice of power source at the socket; Supplied without battery / charger Operation via new more powerful Stanley FAT MAX V20 LithiumIon 18VA battery (4.0 Ah or 6.0 Ah).