Hearing Amplifier. Increases hearing - hear a whisper up to 100 ft. away. Lightweight design fits behind either ear. Mild compression circuit helps muffle muzzle blasts. Adjustable volume control. Tone control tuning. dB limiting. Includes three different size ear tips. Also includes one soft brush and one plastic stick for cleaning. Uses three LR-44 batteries (included). Hang packaged. Made in China. 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 protection. Field tested and recommended by NAHC.