TECKNET Door Alarm Sensor, Window Alarms Sensors, 2-in-1 Alarm & Chime, 3-level Volume Control, Door Sensor for Home Security, Wireless Burglar Alarms for House, Shop, Office, Garage (3 PCS)

Brought for my companies new office for the front entrance. Works great with loud tone.Easy installation with the sticky back application, equally easy to remove with a firm pull and reapply. But equally sturdy, staying on in the door in a busy entry way without issue.Have not used the security function but was extremely loud when accidentally switched on.Pack of 3 worked great, cheaper than other options

Absolutely brilliant door alarms. Easy to fit and they work really well. Great at alerting you if a door has been opened by sounding a very loud alarm. Easy to use. The alarm can be switched on and off easily on the main unit. Highly recommend.

The media could not be loaded. After noticing damage to my door someone’s done trying to break into my flat last night, I ordered this. Very easy to set up and as it’s adhesive, no damage will be done to the door which is great to know as I rent. You can turn it off which is great so you know you can have full control over when it is on. It’s more than loud enough to alert you and to scare off anyone if they were to break in even on the lowest setting which is what I have mine on in this video. It comes in a pack of 3 which is nice incase one breaks or the adhesive strips lose their stickiness. Whether you’re in a flat like me or a house and want to feel that extra bit of security for whatever reason, these seem like a good and cheap choice.

Work well fitted three within 10 minutes only gripe is the chime is not a Ding Dong but more like a cat getting his throat cut

Very happy with these. Installation is very quick and easy. They're discreet and you soon to forget that they're there. To the point that you forget to switch the off and get a fright when you open the door and they go off. On that note, yes they're very very loud and are a great deterrent.

Replacement batteries are quite expensive if you have to replace multiples at the same time, but if your house alarm is off when you are in during the day, these little gadgets are brilliant at providing peace of mind. Loud siren when on that setting, audible all over the house and even in the garden. I keep the 'pulse' setting on my front porch door during the day as so few delivery drivers bother to knock, post covid, just leaving parcels visible in the porch, and it alerts me to the fact there has been a delivery. With the self adhesive pads they are quick and easy to fit wherever you need them. For battery replacement the 'unit' slides out of the housing and slides back in simply with no fuss.

They were ok but specific to a certsin type of door/window.. they didn’t suit my purpose unfortunately

I wanted something for extra security when my husband is away, and this gave me peace of mind. It is loud, even on the lowest setting, which is the point. Easy to install, if you have white doors/ windows, it blends it nicely.Highly recommended.