Campbell Hausfeld EZ4502 Power Mister Internal Ni-Cad Cordless Sprayer Rechargeable NiCad battery holds charge for up to 8 hours of actual spray time Squeeze and hold trigger reduces hand fatigue and eases operation for those with arthritis, carpal tunnel and other strength and flexion conditions Cleans quickly and easily between fluids by spraying hot water through the suction tube until it sprays clear. One turn cansister look, quickly secures canister to head, leak and spill resistant. Allows application of fluid virtually anywhere, no awkard positions necessary to apply cleaning solutions.