In-Line-Amplifier 40Db with Tone Control-Clarity Ameriphone in-line 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-WhiteCLARITYHA40
