Vibration during work and makes a lot of noise, put as a supplement on one large battery, copes with the task. Hanging on heating pipes, nothing touches. Bought 24 volts with a power supply, connected vibration and less noise through a 9-Volt adjustable power supply. At 24 it heats up, I think it won't stand for a long time. 9 volts warm body. As I understood pump one it can be used from 8 to 24 volts. Previously, the pump bought a similar design for the car, it is not heard at all and there is no vibration. I would know that such noise and vibration would not buy.