Battery operated motor has 120 minute run time and can empty a drum in 3 minutes. Has a variable speed motor that allows user to slow speed down to 5.28 gpm up to 15.8 gpm. You can empty up to Ten 55 gallon drums on one charge. Maintenance free with no brushes to wear out and no battery loss or memory effect on the battery. Comes with overload and short circuit protection. Lightweight easy to carry and move around. Can be used indoor or outdoor comes with rubber battery cover. Extremely quick 30 minute full recharge time on the battery. Spare batteries available. Motor color may vary.