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