The dewalt dcm572 flex volt xr blower has a highly efficient brushless motor that delivers up to 15 minutes run time with a 30ah battery allowing you to clear more debris quickly its variable speed trigger with lock allows full power control without having to hold down the trigger the curved tube design creates rotational control and reduces fatigue supplied with a concentrator attachment that increases force for stubborn debris dcm572x1 1 x 54 volt 30ah li ion battery dcm572n bare unit no batte