Listen to sounds originating over 300 feet away with this amazing highperformance device. With its super-sensitive microphone, parabolic sound collection dish, compact lightweight headphones, and sound targeting scope, you can tune in to the sounds of nature or conduct a variety of sound experiments. Just aim, squeeze the trigger, and listen. Super safe, the device has a built-in frequency controller to block out both background noise and harmful sounds above 85 decibels. Requires one 9-volt battery (not included).