1. Unique Design and Function: The builtin monocular is for observing animals from a distance or examining the smallest details of smaller creatures. It features a 3.5mm headphone jack. The sound amplifier also comes with its own headphones. 2. Nature Observation Device: This sound amplifier is designed for observing wildlife from afar. It includes a builtin 8x zoom monocular, allowing you to explore nature in intricate detail. Listen to birds and other animals—this nature observation tool makes it all possible. 3. LongDistance Listening: With this outdoor gadget, you can hear sounds from up to 100 meters away, making it the ideal outdoor device for observing nature without disturbing wildlife. 4. For Birdwatching: This sound amplifier can record 12 seconds of audio while simultaneously capturing sounds. It also features instant playback functions, allowing you to thoroughly observe and analyze the animals in your surroundings.