1.Easy to use: This product is powered by a 9-volt (not included) battery, and the effect is better when used in an open place. Within the aiming range, pull the trigger to amplify the sound. The frequency can be adjusted to reduce noise, allowing your ears to easily feel the beautiful natural notes. 2.Quality material: The main part of the equipment is made of high-quality plastic, which is comfortable to hold in your hand and strong in shock absorption. It is suitable for travel without worry of being crushed or broken. 3.Nature Observing Device: This sound amplifier is perfect for observing nature life from afar. It comes with a built-in 8x zoom monocular, enabling you to observe nature in full detail. You can listen to birds and other animals with it. 4.Ideal equipment: This birdwatcher has a built-in 8x monocular, high-definition imaging, and an effective distance of up to 300 feet, very suitable for observing nature from a distance. You can use an earphone to hear the surrounding sounds while viewing the scenery.