Install it vertical on the washer faucet within a 20 mm external wire, turn the transparent cover counter clockwise put out the battery drawer and put two barries in.
Medium liquid : water
Temperature range: 0- 40 degrees
Water pressure: about 1kg - 4kg ( pay attention, this machine must work underwater pressure)
Power: 3v No 7 battery with 2pccs
Get more information in the manual booklet inside