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Simply point this Sumas SMH-3010 Bionic Ear Listening Device and take aim with the built-in scope and pull the trigger to capture audio within the impressive range of 150-feet! Use the adjustment knob to focus the scope on your subject and the parabolic dish picks up the sound. The volume knob allows you to adjust the volume and minimize any background noise. Included with this Sumas SMH-3010...