Review on 📞 Enhanced Industrial Indoor Outdoor Telephone Ringer by Molly Hoffman

I worked for a phone company for 20 years and heard very loud calls. I would stuff the bells with newspaper to muffle the sound a bit. It's not one of them. My friend with sensitive ears left the room when we first tried it - didn't. The add-on says this ringing is a little louder than any traditional plug-in phone at 90dB (a human scream or a lawn mower). The 2 bells screw on just off center so you can adjust the bells by turning them closer or further away from the ratchet. Tried it out, still nowhere near what I think is loud.