Sound Amplifier. Compact behind the ear design. Volume control allows the user to amplify sound to hear from greater distances. Mild compression circuit. On/Off switch. Adjustable tone control. Allows user to vary the sound quality by increasing or reducing high-frequency amplification. Comes with six LR-44 button cell batteries. Includes cleaning brush, wax pick and screwdriver to adjust the tone control. Lightweight construction. Camo finish. Hang packaged. Walker's Game Ear products were developed for the outdoor market by designer Bob Walker, who is a hearing health care specialist and also an avid outdoorsman. He has utilized his knowledge of the human hearing process to provide products which offer sound amplification plus hearing protecton. Field tested and recommended by NAHC.