I have this CallToU Wireless Alert Button for my mom. It is VERY loud and works great for waking me up when I'm dead asleep, in a room different from where the receiver is located, or if I don't answer my phone, when she needs help. I have one call button positioned by her bed and a second in the bathroom. The only downside with it is that the receiver plugs into an outlet and if there's a power blip, it will alert when the power starts back and make me think there's an issue, so I run over to help my mother and she's absolutely fine.