BT35 DIY Smoke Detection Sensor System with Alarm 85 dB Easy Installation and Maintenance Free for Small Family, Hotel, and Apartment (White)

Thank you amazon for availability of such a unique and wide range of products. Really helpful to me.

Pro : Recd it 1 day back. Tested it with smoke from burning paper, it did not start up. When burning paper was extinguished and heavier smoke came out, it beeped. Beep is loud and sharp, so should alert me, wake me up. Took out the battery before installing it. With no battery, the unit managed to give low-battery chirping sound for 3-4 times, which is good. ______ Cons : Fitting the alarm on to the base plate is difficult, as there are only two clamping spots you waste lot of time standing on the ladder trying to get it fixed. Durability : Dont know yet, will update Battery usage speed : Do not know, will update it after 6 month and 1 year again

Beep is not so loud that you can hear when door is closed

Not good it’s not alarming properly

This product is a wonderful product. It works perfectly. It is a must have product for safety of every family. It sense smoke very Fastly. Sensor works very accurate and faster. We are using it in our kitchen. Because kitchen is a place where we often work with fire. Its built quality is very nice. It works on battery, so no tension of wiring. It can be hung anywhere easily.

I tried agarbatti and fire alarm also large of sound created bilkul perfect work krta hai 2 month ho gye thoda sa bhi dhua hota hai to bajne lagta hai also very good work

There should be a way to test it . It did not give alarm with agarbati smoke even though kept very close to it for long time

I bought 3pieces. 2 are working. One is making beep sounds in 2minute interwel. I tried by changing battery also. But some manufacturing defect I think. The return time is over.