Educational Insights GeoSafari Sonic Sleuth Tune in to sounds from over 300 feet away with this powerful, handheld listening device! Lightweight and easy to use! Includes 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 sleuthing. Supports STEM learning! Great for sound experiments and outdoor exploration. The ultimate eavesdropper and spy tool. Requires one 9-volt battery (not included).