Powerful Telephone Ringer

Be sure to get all your phone calls while you are outdoor or far from the phone. This telephone ringer amplifier emits a powerful sound which can be heard everywhere in the house and even from outside while you are working in the garden. No batteries are required! Simply connect your phone to the device and plug the device in any telephone socket. The ringer can be deactivated thanks to the on/off switch. Measures 2" diameter.