The Bionic Ear and Booster is the Original Sound Amplifier. With this device, you can magnify faint or distant sounds with a clarity you never thought possible. Detect animal movements for nature observation or photography or direct microphone toward a distant conversation for surveillance or personal safety. Record bird calls and other sounds with the recorder output jack located on the microphone. The Bionic Ear and Booster is the only pinpointed amplifier of its size available to the consumer market.