This is only my opinion but I think these fancy controller gadgets are a waste of money.
I have a mk1 analogue controller from spring ( when they were formerly crow electro ) 10 years old now and very basic, just contols flow and nothing else, simple and faultless. i tried the digital version with dead end detection, battery level , calibration blah blah and hated it, was forever fiddling with the settings (now in my toolbox).
unfortunately they no longer sell the mk1, but others here have made their own or bought a dial from ebay, maplins and the like.
Read how many posts there are about flow controller problems on here !
A remote one is just another thing to go wrong, you don't need to turn the flow off remotely, a tap on the end of your hose or pole will do that.