I have ordered 2 on Amazon, and I am waiting to receive them. The only issue I can see is they are a big block power adapter style that eats up two plugs on any outlet. They need to be on a 110v dongle. For lack of design thought they get three stars.

Before I got this plug I was having to manually adjust my humidifier output several times a day. With this plug and a ultrasonic humidifier from Goodwill, I just have to add water. Make sure the humidifier has an adjustable output dial not just L/M/H and that it doesn't require pushing a start button every time power is interrupted. On my 69 contrRead more about review stating Allows me to maintain steady VPD with a 69 Controller - and get more sleepoller the plug is controlled on Low Limit at 57% when my lights are off. During lights on period, the plug operates on Low Limit at 70%. Capacity of humidifier was dialed in to minimize cycling while maintaining Rh during both automation modes. My 6" Inline AC Infinity fan also has two automation cycles; lights off has a high humidity limit of 59%; lights off has a high humidity limit of 71%, both cycles have min/max speeds at 1/7. Transition temp is 2degF, humidity is 1%. With these settings humidity is controlled +/-1% and VPD at 1.0 +/-0.1, 24/7. At lights off, the inline fan quickly ramps up to 6 or 7 (on the high humidity limit) to ventilate the tent and get the humidity down at the same time the tent is cooling because the lights went out. Tent humidity gets down to 60% within a minute. In a perfect world I would have a 69 Pro controller to have "Buffer" setting for the plug, VPD automation and WIFI connection. But this plug and the right humidifier can replicate the VPD control with the basic 69 controller