- Recording and playback: This sound amplifier can record 12 seconds of audio and ambient noise at once, with instant playback to fully observe and analyze animals in your surroundings. Bird watchers and nature lovers will appreciate the sound quality of this listening device. - Long distance listening: With this outdoor gadget, you can hear sounds up to 300 ft / 100 m away, enabling observation of nature without disturbing the animals. - Easy to use: Its built-in monocular is great for spotting animals from afar or for watching the slightest details of smaller animals. It includes a 3.5 mm headphone jack and a pair of headphones to avoid disturbing your surroundings. - Design and operation: This product is powered by a 9-volt battery (not included) and works best in an open place. Pull the trigger within the range to amplify the sound. The frequency can be adjusted to reduce noise, allowing your ears to easily hear the beautiful natural notes.