Koostone Wireless Magnetic Door Entry Sensor Alarm Chime, Door Open Alert for Shop, Garage, Window Security for Kids, Elders Safety, Anti-theft, 2 Secure Contact Sensors, 1 Doorbell Plugin Receiver

Was working great, then stopped working after 6 months

I use these on two internal doors, rather than front/back door. Work as described and only had to change one of the batteries once recently after 6 months in use. Batteries are cheap enough to buy. You could even fit these to cupboards etc if you really wanted too. But remember you would have to turn the main unit off if you wanted to disabled the chime. Would recommend.

These do what it says on the label different sounds for mulity of doors

Initially the door chimes were great (I purchased 2 for 2 shops) - worked when customers entered/exited the shop, unfortunately both chimes have stopped worked after 3 months! We have changed the batteries but nothing seems to work. Lights arev still coming on to show that the door has been opened but no sound! We have checked and the bell itself still works when we press the button on the actual unit but not when anyone comes into the shop. My advice - dont waste your money, if it was just one unit then maybe you would say it it just faulty but both units at seperate shops stopped working within days of each other, so maybe they only work for a very sort period of time. Warranty is only 60 days so cannot return as faulty either!

Having purchased this on 6th July '22 we're a little over 12mth into using these, the one attached to the front door as been fine, never missed a beat, the one on the back door is another story, after a few months of use it started working intermittently, now it doesn't work at all, tried new batteries, re-syncing, no joy, the blue led works, but no sound!

It’s ok

Love this little product. we have it fitted to the front porch door so it acts like a door bell when someone opens the door. they cannot hear it from there or outside so good for security as they also cannot see it as it is fitted at the top of porch door and framework. Never had any problems with adhesion or noise level and so easy to install.

Installed it on our front door when we have the builders working on our house so that we know when people are coming and going into the house. Works as described and has been working for the last 4 months with avg 5-6 opening/closing of the door per day. The receiver was attached to the middle of the house and it's loud enough for the household to hear even with the low volume. Unfortunately, we lost the second pair of the door sensor before we could install it at our back door.