Super ears for young super spies! This powerful Sonic Sleuth is a handheld listening device that 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. The 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. The Sonic Sleuth is perfect for science experiments and wildlife adventures. Its the ultimate eavesdropper. Requires one 9-volt battery not included.