1. Application: A sound mobile device that acts as a bionic ear. Designed for outdoor hunting, sports, or all recreational venues. Bird watchers and nature lovers will be thrilled with the sound quality of this listening device. 2. Long-lasting: This outdoor gadget features a durable design. In addition, it is powered by a 9V battery (not included). This battery can provide enough power to get you through the day. 3. Special Design and Functionality: Its built-in monocular is perfect for spotting animals from a distance or observing the fine details of smaller animals. It comes with a 3.5mm headphone jack. The sound amplifier also comes with its own pair of headphones. 4. Nature Observation Device: This sound amplifier is used to observe natural life from a distance. It comes with a built-in 8x zoom monocular. With it, you will be able to observe the most complete details of nature. For birds and other animals, everything is possible with this nature observation device.