Haozee Human Presence Sensor,2.4 GHz Wi-Fi Required,Smart Mmwave Radar Presence Sensor with Light Switch,Auto-On/Auto-Off,No Hub Needed,for Home Security Home Automation

I’ve been using the Haozee Human Presence Sensor for a little while now, mainly to detect movement in and around my garage and front porch and run some automation based on that. Setup was ok since it connects directly over 2.4 GHz WiFi—no hub needed. I wish connecting to power was a little more straightforward. I had to cannibalize an extension cord and muck around with bare wire which makes it painful to install. However, once I got it running, I noticed right away that the mmWave radar is more sensitive than the old PIR sensors I used before. Even if I’m just standing still, the lights stay on, which is a big win.The detection angle is a bit narrower than I expected, especially if you mount it on the ceiling. Sometimes you have to be right in its path before it notices you, and there are little “dead spots” close to the unit where it won’t pick up presence at all. It also took some fiddling with sensitivity and light threshold settings before it felt reliable.I also ran into some confusion with compatibility—the description could be clearer. It works fine with Alexa and SmartLife.Overall, I’d give it about 4 stars. It does the job of saving energy and making my lights more convenient, but you need to be mindful of placement and settings. For the price, I think it’s decent value, but it won’t be flawless in every room.

The device is made of a white plastic build and I can either use the included clips or use screws to install it on the wall or ceiling. I ended up using two white power cords with polarized plugs to hook up the human presence sensor to a lamp. The installation instructions are clear and there's a wiring diagram on how to hook it up. It uses the Smart Life app I already have installed from the Google Play store to control it and change settings. I linked it via 2.4 GHz WiFi to my phone. There are few functions it can do. I can also link another device controlled by Smart Life to perform an action like turning on one of my WiFi bulbs to a red color at 50% brightness. In the Smart Life app, I can set the detection distance from 1.5 to 6 meters (4.9 to 19.7 feet). And I can also see the current distance of someone to the human presence sensor with quite a high accuracy. The app keeps a log of when it detected presence and at what distance. And the app can even send a push notification and sound an alert.

I'm not sure if other countries have safe ways to utilize something like this, but I can't find a convenient way to use this as it seems they have intended. It doesn't seem to be designed around mounting to a junction box, just hung directly. Since it seems the only safe way to use it would be to wire it to a cord directly and plug it in, and I'm not sure any easy way to use it in this manner that wouldn't be an eyesore with a cord hanging from the wall. I suppose, if you have a use case for this as a presence sensor that'd mount in line with a cord, where the cord is in a location where the sensor would actually be able to do its job while supplying less than 2 amps, it's fine. Seems to work well enough when used this way, and is pretty sensitive. Otherwise, everything else about this makes it a bad idea, stick to usb or battery powered devices if you don't want to mess about with junction boxes and 110v wires.

Folks I never had a chance to really see how well this worked as when I attempted to wire it for power I fried it....This thing takes 110volts and I tried to wire it with a test cord I have and the wiring block is made for small wires and apparently I didn't get one of the wires cleanly inserted and when I plugged it in, well that was it for this...So all I can say is be very, very careful when wiring this... The manufacturer would be well advised to modify the wiring block...

The Haozee Human Presence Sensor works well. The mmWave radar does a better job at detecting subtle movements or lack of movements than the more common PIR. I highly suggest building a backer box for this device, though. As it's currently designed, this is not up to code for north america without being inside a box. I dont love AC wires being this exposed in a wall or ceiling.

I installed this sensor hoping it would catch intruders, or at least turn on my lights without me having to fumble around like a confused raccoon in a garbage can. It does just that—turns on the lights when you enter and off when you leave—no hub needed, just Wi-Fi and some patience while it figures out you’re not a sneaky dragon trying to break in.The sensor is so sensitive, it once turned on the lights when my cat tiptoed by. Either it’s smarter than I thought, or my cat is secretly training to become a ninja. I swear this thing could detect a ghost if there was one lurking in my living room.[Disclaimer: This review is for "Haozee Human Presence Sensor,2.4 GHz Wi-Fi Required,Smart Mmwave Radar Presence Sensor with Light Switch,Auto-On/Auto-Off,No Hub Needed,for Home Security Home Automation". This is a review of a free-but-taxable product, made available via Amazon's Vine program, with adherence given to Amazon's review guidelines. Honesty is encouraged; no incentives were given by the seller.]