This powerful, handheld listening device tunes in to sounds from over 300 feet away! The state-of-the-art Sonic Sleuth features a high-sensitivity microphone, parabolic sound collection dish, high-quality headphones, and sound targeting scope. Built-in frequency controller blocks out harmful noise above 85 decibels for super-safe sonic sleuthing. Young scientists and detectives can listen in on birdsong or buddies’ conversations. Perfect for science experiments and wildlife adventures. It’s the ultimate eavesdropper! Requires one 9-volt battery (not included).