Mike Boyle

Hi, I am looking to replace two FireAngel ST-620 units. Both have been replaced under guarantee at least once, one twice. The latest bleeper expires in 2027, FireAngel replace them promptly but my home and family are unprotected while I work away, plus one is out of reach so not easy to disable. Can anyone recommend a reliable alternative? One is downstairs by the front door at the foot of the stairs, the other on the upstairs landing. Cheers Mike