As avaliações de clientes, incluindo as avaliações do produto por estrelas, ajudam os clientes a saberem mais sobre o produto e a decidirem se é o produto certo para eles.
Para calcular a classificação geral por estrelas e o detalhamento percentual por estrelas, não usamos uma média simples. Em vez disso, nosso sistema considera coisas como o quão recente é uma avaliação e se o avaliador comprou o produto na Amazon. As avaliações também são analisadas para verificar a confiabilidade.
Works great but the motion sensors are too sensitive and tend to move frm original position. I took them down but would b good inside a shop or garage where there's no wind or insects...still using the window and door alarms, wrk well.
I use this system on overhead garage doors to indicate an alert in the home when one of the doors has been left open. Over the past two or three years it’s been working far more reliably than other systems we’ve previously used. It’s not perfect though. It can be difficult to change the battery in the transmitter and no instructions for doing that are provided. One of the transmitters stopped working and I discovered that one of its circuit board components had fallen off the board.
The instructions were written by someone with a good comand of the English language but no mention is made of the type of battery used (a CR2032) or how long the battery should last. That oversight may be intentional as it is impossible to open the case (to replace the battery) without damaging the sides of the case. I had to file down parts of the case to make it easier to open.
Works very well. This is an addition to an existing system. Only gripe about the system as a whole is that the receiver has to be plugged into the line, which severely limits where I can locate it. I can build a battery pack for it, so it isn't hopeless. This transmitter works very well at about100 feet range.
Added 6 Apr 2015: Tried to set one on my nearby all-wood barn. About 170 feet clear line of sight, no obstructions except the outside kitchen wall, which is drywall and vinyl, (not aluminum siding). Within half an hour the "lost signal" starts flashing, Tried swapping to another sensor - same result. Tried re-orienting the receiver antenna - same result. The claimed 800 feet range is obviously WAY too optimistic.
I needed to get this to keep my 16 year old from sneaking out. Works very well and very easy and fast to install. I sleep better at night knowing that the teenager can't open the doors and windows w/o me knowing. I also feel so much better knowing that if someone trying to come in I'll be alerted. It's nice that it has 3 settings; just the light flashing (good for when you're home and want the doors open), alarm where it sounds only while the door is open (turns off when you shut the door) and alert that doesn't stop until you mute it. I highly recommend this product for a cheap and easy solution to home security.
The device was used to detect turtles coming through three gates in the yard to alert me as to their arrival. This was not the intended use for the device but it worked really well! The system got a late start in the year 2014 but will be put in service again in '15. The modified use for the device was very worthwhile in time and money!