I wouldn't buy it. Too much pressure, the battery only lasts 7 hours.
If the battery only lasts 7 hours, then ideally it should be charged after 3 .5 hours, half way through your working day. It does batteries no good at all, using them till they run flat. That battery really needs to be twice the capacity. I would also like to know what the flow rate is on the first setting, at 5 ltrs a min, you would need a hydrant close by.