The good vibration is a wireless receiver.This unit receives signals from various transmitters which, in turn, causes a vibration and turns on a light below the symbol to let you know which transmitter is sending the signal. You can monitor any or all of following devices the doorbell,telephone,smoke detector,sound monitor personal pager, fire alarm transmitter and door/window access transmitter. Receiver works on 1 9 v rechargeable battery included. Need to purchase separately a bat chgr,stand alone charger or the sleep alert charger to charge 9v battery.5 Year MFG Warranty. Product dimensions (imperial): 1 inch H x 3.75 inch L x 2.5 inch W Product dimensions (metric): 25.40 mm H x 95.25 mm L x 63.50 mm W
Trustpilot
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