Review on ๐ฅ SA521CN-3ST Hardwired Wireless Smoke Alarm with Photoelectric Sensor and Battery Backup - FIRST ALERT by Luis Nelson
The best false alarms for smoke and fire detectors
I bought two from Revain. which is a mistake because it's impossible and shouldn't skimp on security. There were also false positive results. one at 12 and the second time during the day and it didn't stop and the second alarm didn't drown out the other. Also the model number I got was SA520, not the one shown here.
- Ideal for outdoor activities
- There are other interesting options.
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