1.Special design and function: Parabolic sound collecting dish bionic ear mobile device, 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. 2.Ideal equipment: With this outdoor birdwatcher gadget, you can hear sounds up to 300ft/100m away. This makes it the perfect outdoor gadget to observe nature without disturbing the animals. 3.8X Monocular: parabolic microphone monoculars design is very attractive, and the 8x monocular telescope allows you to see objects clearly at close range. The ergonomically designed handle can be easily operated with one hand only by pulling the on/off trigger. You can adjust the volume from low to high to get better hearing. 4.Easy to use: This sound amplifier is powered by a 9-volt battery(not included), the effect will be better when used in an open place. Within the aiming range, then pull the trigger to amplify the sound. The frequency can be adjusted to reduce noise.