In Line Amplifier Tone Control 40db

In Line Amplifier Tone Control 40db Clarity Inline Receiver Amplifier Increases Incoming Call Volume Up To 40db (increases Incoming Volume Up To 100 Times) Tone Selector For Maximum Speech Clarity (amplifies Selective Frequencies) Connects Between Handset And Phone Base Compatible With Most Home And Office Telephones With Modular Handset Cords Cannot Be Used With Telephones With Dialing Pads In The Handset Turns On Automatically When You Lift The Handset Low Battery Indicator (red Led) 9v Battery Included Slide Volume And Slide Tone Controls Boost Button Eliminates Background Noise And Feedback For Extra Loud And Clear Conversations White Brand: Clarity