I purchased this alarm a year ago and was pleased with the product the first month. We were getting the alarm notice when vehicles or animals past in front of it. WE thought this is great since my husband and I both have hearing loss. Then the inside monitor reminded us the power source is low, meaning replace the batteries. It takes 4 batteries for the inside monitor. Replacing the batteries was every 3.5 - 4 weeks and gets expensive. Also the alarm doesn't sound every time a vehicle passes in front of the sensor. I'm replacing this alarm for another for just a few dollars more with better reviews.

[original 10/10/22] My main concern is the bottom flap. Will the micro USB port and the toggle switches rust out? We shall see. Several hours in and it's working perfectly!
I wish they would add a like dial that would let you select one of 20 chimes.

Full review:
For the past 3 years, we have been using the Htzsafe 1/4 mile driveway alarm. This 1/2 mile range is better. There's a bunch of walls to go through, so I'm sure neither will go the rated distance, but at least these are not arbitrary numbers. This eMACROS is longer range than Htzsafe

The Htzsafe only has a single button on the sensor and was very finicky to set the range (it was also used for on/off and pairing). The toggle on this eMACROS was appealing to me for that reason. But, it's a possible point of failure. So we shall see. However, the Htzsafe had 50, 30 and 25 foot ranges, this eMACROS only has 20 and 30. I'm not quite sure what I had the Htzsafe set to lol it was so finicky, I just know it was not enough out of the box and I had to turn it up, and after several tries it worked better. So far the 30 feet range is working well, and my driveway is about 30 feet wide.

The Htzsafe hung directly on the outlet which was perfect for me, but this eMACROS is more options, you can put it anywhere, and it can be battery-powered. So I found a different place to put this eMACROS since it can't hang on the outlet, and it's fine. It does have an eye hole to hang it on a screw so it can be hung, just not directly on the plug.

The Htzsafe had more chimes. The receiver only had 2 buttons, but that was okay, following the instruction manual (don't throw that away on something with so few buttons!) I could change the chime, some were longer some were shorter. It appears this eMACROS only has one chime per channel. So if you put 4 sensors on this receiver, you have no choice of chime. The main thing I want to change is how calm it is, and how long it is. Maybe some toggles to change that for a future version?

Mounting this thing to a tree was weird, but if you watch the main video (for now - amazon pages change over time) they show rotating the sensor 45 degrees so you can get a screwdriver to the mounting hole. I didn't think to do it that way lol. I'll leave it at that. The Htzsafe was much easier to mount and seemed too loose, yet it never fell/sagged for 3 years. Both work, but if you plan on moving it all over the place and readjusting until you get it within an inch of where you need it, the Htzsafe would be easier in that regard. The Htzsafe also used a standard ball so you could use other mounts. This one looks like it uses a ball, but it's not a ball and socket. it actually has a screw holding the 'ball' on, there is no socket. You can loosen or tighten the screw, but you have the unmount the square plate to get to it. This one basically is made to aim straight ahead, and that's all I need unless it starts having issues.

Works well. Mounting plate is light duty and possibly easy to break. Concerned a deer or coyote might get interested in it and tear it off the tree! They already attack my camera trap... Sensitivity even on low is possibly too high to eliminate triggers from animal traffic so lots of false alarms.

These are awesome! They work great and pick up anything that crosses in front of them, even a bird. We had to find the right direction to not pickup road travelers passing by from our busy road but since they have served greatly to allow us to know when someone is pulling in the driveway. These are easy to install. We purchased the 2pk so we could have these in two locations of the property. I would buy again!

Have been using this alarm with 2 sensors for over a year now. Very few false alarms on a 1/4 mile driveway. The solar panels on the sensors are a really nice feature, (no batteries to replace). When there's a lack of sun, (mostly in the winter months), the main unit announces to recharge. Customer service is excellent. After a year of service, I had one sensor that started losing power and was unable to hold a charge. They replaced the sensor without delay. I've had 3 different alarms over the past 10 years, and these rate right up there with Guardline. My only complaint is the volume control is hard to maintain. Seems to always be loud where ever the voulume is set. Wish it had a counter that kept track of how many times the alarm was tripped. I use game cams on my driveway as well and would be nice to know when to check the cameras after being gone by seeing if the alarm had been tripped. But, still looking for that feature with others as well. These are the best bang for the buck.