1.Ideal equipment: The sound detecting system is powerful enough to monitor conversations up to 100 meters away Handheld parabolic sound dish. Hear sounds up to 300feet, Adjustable sensitivity dial. 2.Easy to use: and running on a 9V battery (not included in delivery), easy to carry from place to place. Built in 8x magnification monocular. Fain bird songs are readily detected. 3.Quality material: The main part of the equipment is made of high quality plastic, which is comfortable to hold in your hand, strong in shock absorption. Take it when you are travelling, you don't have to worry about being crushed or broken 4.Lasting : Its built-in monocular is great for spotting animals from afar or for watching at the slightest details of smaller animals. 3.5mm Jack for headphones (includes headphones). External recorder can be attached through 3.5mm Jack