The receiver operates on 1) internal user-replaceable 9v rechargeable battery
(included). Recharging requires either the "BatChgr" stand-alone charger or the
Sleep Alert charger.
The Good Vibrations System is wireless and uses advanced electronics to monitor a wide variety of important household devices such as telephone, doorbell, smoke detector, etc. One major benefit to this system is that you may purchase the complete system all at once or build it, one transmitter and/or receiver at a time. We can help you custom configure a system to fit your life-style and needs.