With the battery-operated Marina Multi-Vac, you don?t have to worry about electrical shock when performing aquarium maintenance tasks. Simply push the start button and the Multi-Vac jumps into action for stress-free cleanups. Multi-Vac comes complete with a side bag that easily traps debris. You can also easily attach a hose when a water change is needed. The Multi-Vac is extendable from 20 to 40 cm (8 to 16 in), providing ample reach for most aquariums.,