Just swapped out the old Blink for the HQ. The instructions were inadequate. There were errors as well; the guide says there is a PE, L1 and L2. This one has a N, L1 and L2. But after some mishaps it is working well now.
There is an On/Off switch and I have to remember to turn it off. My old Blink did not have an On/Off switch, you just unplugged it.