1byone Driveway Alarm Wireless Outside, 1 Receiver 2 Infrared Sensors

The cheapest best portable alarm I have found. I got two sensors for the price of one compared to other offers. Been using one on my front porch to alert me when I'm out on my back deck for years. Batteries last a year or more. Good for scaring off Snoopy people around your equipment you parked away from your house.

These are very effective and you can find out if animals or vehicles by just setting height of sensor. If you have not thought of it.

works great. I use it to alert me of armadillos/possums/raccoons in my yard at night

This works well as most people have said. However for me, the advantage of its sensitivity is a downside for me. I have a lot of trees and grass next to my driveway and when the wind gets going, the alarm goes off frequently because it can't discriminate (duh) between a car and a trees blowing in the wind. I tried taping over part of the sensor window but that hasn't helped. Also, FYI, the "Ding-Dong" sound is not really a chime but more of an electronic two tone sound. So back it goes.

Worked as expected

Receiver unit was missing 2 of the battery connections.Unbelievable !! Now I have to get a refund or exchange.Poor quality control. I'm afraid to get a replacement for fear it was an assembly problem and I'll get the same thing again. I may try to buy from another manufacturer.

UPDATE AT BOTTOM OF REVIEW! I swear this thing goes off 30 times a day. I know the batteries wont last a month. Its been windy, and despite the fact that there is NO GRASS, no weeds, no bushes, NOTHING within distance of eithjer of the sensors, it still goes off. This morning a person pulled into my driveway super early in the morning to see the suv I have for sale, and this did alert me. So that was good (the reason for 3 stars and not one). But I can pull into the drive further away than 12 feet and a big old Toyota minivan does NOT set the sensor off. BUT A BUSH 3 TIMES FURTHER AWAY DOES??? Look, My user ID says it all. I know a lot about this type of technology. I cant figure it out. Others pointed out that overcast (sun going behind clouds) will trigger the remote sensor, I am not seeing that happen. I do have the advantage of watching it happen on a myriad of cameras. I am without words. WHY? There is nothing i can see setting it off. I will note it stops falsing after dark. Its frustrating. NOT reliable at ALL. I'm going to keep it till I can find a better model locally. UPDATE. Been a week or so without much wind, and it works GREAT until the wind starts blowing a lot. Apparently the wind moves shrubs that are (technically too far away to be detected.. so thats still a mystery) but wind messes this thing up. On a calm day its works PERFECT.

These alarms are awesome, the alarms works very good have level that make sounds to get anyones attention, I guess I will be ordering another set

El sistema de alarma está tal como se anuncia y llegó en perfecto estado y funciona muy bien. Muy Satisfecho.

Product claimed to be security alarm, but alarm is very even with high volume, I placed the product in ground floor and sensor in first floor when motion detects volume is very low if I am in the other side of house. We have to carry that device where ever we go to get the alarm sound. Also with this price there is no power adapter for the receiver. Not worth for the money. Product shall be improved better.

Bad quality