1.Application: Sound mobile device which acts as a bionic ear. Design for outdoor hunting, sporting or all entertainment venues.Bird watchers and nature lovers will be thrilled at the sound quality of this ingenious listening device. 2.lasting : The outdoor gadget features a durable design. It is furthermore powered by a 9V battery (not included). This battery brings along enough power to get you through the day. 3.Special design and function: Its built-in monocular is great for spotting animals from afar or for watching at the slightest 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 Observing Device: This sound amplifier is perfect for observing nature life from afar. It comes with a built-in 8x zoom monocular. Thanks to this, you'll be able to observe nature into its fullest details. Listen to birds and other animals, everything is possible with this nature observing device. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.