SECRUI Door Chime 500ft Operating Range 52 Chimes Adjustable Volume with Mute Mode LED Indicators 1 Plug-in Receiver 1 Magnetic Door Alarm Sensor for Home Security & Office

Not of much use on the freezer door as it only sounds for a short time and doesn't repeat if the door is accidentally left open....which is why we wanted it.

I installed this in my garage workshop because I kept missing it every time someone came through the house door. Now I know the exact moment my concentration is about to be wrecked, which is somehow comforting. Setup genuinely took about three minutes. Plug the receiver into any standard outlet, peel the adhesive backing off the magnetic sensor, stick it to your door frame, and you are done. No wiring, no tools, no drama. The sensor just needs to stay within about 0.4 inches of the magnetic strip when closed, which is easy to get right. The 52 chimes are a surprisingly fun feature. You can go classic ding-dong or cycle through holiday tunes, classical snippets, and some options I cannot quite categorize. The volume goes from a polite whisper all the way up to 110 dB, which is loud enough to hear clearly across a large space. The mute mode with LED-only indicator is a thoughtful touch for nap time or quiet hours. Range tested well beyond what most home layouts would require. The unit remembers your chosen chime and volume after unplugging, which saves you from re-setting it every power blip. Battery life on the sensor will depend on usage but is rated for a high number of trigger cycles. An excellent value for a simple, reliable alert system.

La verdad no le tenia mucha fe pero me sorprendió lo uso para mi negocio

Worth the price, excellent chime sounds.

Update: I figured out how to take it off the door to change the battery, and now it works again. One star removed because I feel like it should last longer/be easier to change the battery. Also, after I left my original review, the company reached out to help with instructions and offered me a refund. --- Original update: It worked fine and was easy to install initially. But 6 months later and it just stopped working. It looks like the door sensor and the receiver are no longer paired? Or maybe the battery in the door sensor died? But because it's attached with double sided tape.. not easy to remove and try to fix.

Great. I have a 3 year old who sleeps in her own bed and I was always worried she would walk out of the door while I was asleep. This definitely eases my mind!