1. Unique Design and Functionality: This sound amplifier can record sounds for up to 12 seconds simultaneously. It also features instant playback functions, allowing you to comprehensively observe and analyze the wildlife around you. Birdwatchers and nature enthusiasts will be amazed by the audio quality of this ingenious listening device. 2. LongDistance Listening: With this outdoor gadget, you'll never lose track of your favorite animals again. It enables you to hear sounds from up to 100 meters away, making it the outdoor tool for observing nature without disturbing wildlife. 3. Easy to Use: The builtin monocular is ideal for spotting animals from a distance or observing the finest details of smaller creatures. To avoid disturbing your surroundings, it comes with a 3.5mm headphone jack. The sound amplifier also includes its own pair of headphones. 4. Durable Design: This product is powered by a 9V battery (not included). Performance is enhanced when used in open areas. Simply move the trigger within range to amplify sound. The frequency can be adjusted to reduce noise, allowing your ears to easily pick up the beautiful sounds of nature.