SECRUI Wireless Door Open Sensor Alarm Chime, 400ft Operating Range 52 Chimes Volume with Mute Mode Led Indicators 1 Plug-in Receiver 2 Magnetic Door Alarm Sensor for Home Store Office Security Black

I got this for my toddlers bedroom door so I would get woken up in the night if he started wandering. It's really easy to install, lots of settings. Loud enough to wake me up when his door is opened as I wanted it to, and a large variety of tunes but to be honest the basic one is enough. Good quality.

Versatile, neat, with a good, very loud for it's size, urgent alarm, with lasting 1 minute option if not stopped before using handy portable remote or slider on/off alarm housing switch. A good, well priced product, and very efficient standard Amazon delivery.Designed for flush fitting doors to frame. I found it needed packing underneath the magnet, and more if it was a recessed door or, say, a window frame with sloping mitres on the slope, but easily rectified.

The unit is really easy to set up and fit to your chosen location.You are able to fix it to the surface with self adhesive stickers or fixing screws supplied.Once a door is opened and the connection separated,the alarm is activated.Works really well and gives you added security.The main receiver plugs in to a socket in your chosen room.

Great product and their Customer service is 5* too. I had a small issue but the customer service team were outstanding and very helpful.I highly recommend and would buy again

The quality is not good, I just used it for one month, one of them automatically fell off and broke directly, and the other one also failed to call in the second month. After checking, it was not a battery problem, but an internal wiring problem. It kept ringing when taken off, but there was no response when installed on the door. Very poor shopping experience

Easy to install and worked well..7 months later and with fairly low usage the battery is gone and says it cannot be replaced. Disappointed by the product as for the price you would expect more usage or at least a replaceable battery.

I (my mate actually) had fitted a set of alarms from another manufacturer (beginning with N). They were OK at first, but some stopped working and most didn't work again when the button batteries were replaced.These are louder (enough probably to at least make a burglar think twice about carrying on), really easy to operate and set up by myself (and I am not practical by any description of the term), and the AAA batteries don't look like they will cause problems when they are changed. I think they are a couple of steps above what they replaced (all the previously fitted ones). One feature I like is that you can't mistake what setting chosen (clear and easy to understand audible signal when you set them - alarm has one beep, the three other settings have two, three, and four beeps). The only fault I can identify is that there is no low battery indicator. If you change the batteries every six months (very easy) that will be no problem.

Brought these to keep autistic child safe