1.Nature Observing Device: This sound amplifier is 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. 2.Long Distance Listening: With this outdoor gadget, you'll never lose track of your favorite animal again. It allows you to hear sounds up to 300ft/100m away. This makes it the outdoor gadget to observe nature without disturbing the animals. 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.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.