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This telephone extension ringer can be used to increase the volume of your existing landline phone or to relocate the ringer into a different room or location. It is ideal for industrial environments where background noise can mask the sound of your ringing telephone. Includes mounting screws.
Features: • Wall mountable • On/Off switch • Multiple tone and pitch selection • Volume control • Multiple input types • 8-12 ohm output for horn speaker • No battery or external power required