Review on 🔔 BNYZWOT Active Piezo Electric Buzzer Alarm DC 3-24V - 10Pcs - Continuous Beep, Electronic Sounder by Chris Norman

I bought these to replace a failed piezo siren/buzzer in a Visonic Powermax Pro home security system. The original was PZN-65, which I couldn't find other than a minimum print run of 1000 copies. I only needed one so I bought these. They work and fit in the center, but despite the same size, they sound much weaker. The minimum sound pressure level is 85 dB and I read that it should go up to 100-105 dB. They don't sound exactly like they do. The PZN-65 is rated at 109dB and was much louder. I originally bought a 120dB siren to physically place outside of the panel with the cable inside, but it wasn't sensitive enough to respond to keypad beeps and exit delay beeps. So now I use one of these internally to get keypad/exit delay beeps and this 120dB as a second siren to turn up the volume (it's LOUD. My ears still hurt from testing!)