I modified it before even using it. The pump that comes with it uses 4 D batteries, but to turn it off and on is the stupid little red button on the box. Plus the base of the pump won't fit in the jug. So I bought a sprayer pump with the lowest flow rate (1.2 gal/min) and turned down the pressure sensor to a low pressure, then added a ball valve inline to the shower head so when you turn off the water, the pump shuts off. Power for the pump comes from the battery mounted on the Jumping Jack using the 2 pin trailer wires. The tent was designed for a shower bag only so I zip tied a clip to the shower head and just hang it from the hook. Mike