Ideal for bird watching and observing wildlife. Designed with a powerful optical zoom viewfinder function with a magnification of 8x, you are able to follow objects optically with no need of using extra monoculars.Lightweight 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.With these high-quality headphones, you can hear sounds and noises over a great distance (up to 200 meters) . 8 prism optical system, using folded rubber eye mask, roll up the eye mask to properly expand the viewing angle, the structure is stable and durable.Equipped with built-in digital recording chip can be used for recording for 12s, playback or copy the file onto a standard audio tape for preservation.With this audio listening device at your fingertips, even the weak bird singing can be easily detected. This high quality listening and observation device is definitely a surprise for every opera lover, bird observer, animal observer etc.