1.Special design and function: Ideal for bird watching and observing wildlife. Designed with a powerful optical zoom viewfinder function with a magnification of 8x, you can follow objects optically without using extra monoculars.2.Ideal equipment: The sound detecting system can monitor conversations up to 300 meters away. It has a handheld parabolic sound dish, can hear sounds up to 300ft, and has an adjustable sensitivity dial.3.Easy to use: and powered by a 9V battery (not included), easy to carry around. It has a built-in 8x magnification monocular and can readily detect faint bird songs.4.: Its built-in monocular is great for spotting animals from afar or observing the slightest details of smaller animals. It has a 3.5mm Jack for headphones (includes headphones) and an external recorder can be attached through the 3.5mm Jack.