Wide Application: This acoustic guitar pickup is excellent for most string instruments, such as guitar, ukelele, violin, banjo, mandolin, etc. Not suitable for non-acoustic instruments such as electric guitars. Can be connected to different recording devices, guitar amplifiers, mixers, etc. Flexible volume control: Guitar transducer volume can be adjusted at will, crisp sound to avoid harsh noise. Scroll up and down to adjust the volume, adjust to the upper middle position for better effect. Micro vibration, without any environmental interference. Highly restocked and uninterrupted sound: micro electric transducer adopts imported chip, equipped with oxygen-free copper connecting wire to ensure stable sound transmission, and the output sound is more clear and accurate, and the original sound of the instrument is restored to the maximum, and the distortion is low. Lead-free, easy to uninstall: The violin ukulele pickup sensor with reusable stickers, say goodbye to punches, can be removed and reused anytime when not in use, just twist hard slowly, no need to use sharp objects such as blades to remove, without damaging your instrument.Contents: Mini size and easy to carry, suitable for personal practice. Package contents: 1 x Acoustic Guitar Pickup, 1 x Transducer 3m Amplifier Cable (6.35mm output), and 4 x Stickers. Note: The data are all manual measurement, please allow an error of 1 - 3cm, due to the light and display difference, there will be some color difference, depending on the physical object received.