LifeLink has always been associated with state-of-the-art and affordable medical alert products, and we have taken medical alert monitoring to a new level with Prodigy. All configuration and status checking is done through voice prompts, similar to setting up a voicemail system. Designed to work with traditional as well as digital/Voice Over IP (VoIP) phone services. Even use a cellular phone as your lifeline through our Bluetooth cellular adapter. The volume level of the siren is adjustable. You can also de-activate the siren completely if you wish. Siren volume sound range, if programmed to sound, is from 30 to 80 decibels. HELP and CANCEL buttons exist not only on the pendant, but also on the Console itself. This facilitates activating and/or canceling the emergency process with either device.