HiSpec HSA/BH/RF10-PRO - Radio Frequency Battery Heat Detector 10 YEAR, White

Ideal for what they were made for.

exactly what wanted, fits into old smoke alarms place, was to be delivered on the 19th but came at least 4 days earlier, and also at least 15pounds cheaper then local diy shop

Arrived when it was supposed to and was well wrapped - proved to nice and waterproof. Had to deal with the supplier directly and they were prompt, polite and helpful, happy to deal with them again. Can't comment much on the detector itself until the house is on fire but I'll let you know.

Didn’t work