L.R. Baggs M80 soundhole pickup for acoustic guitar. This is a magnetic pickup that attaches to the soundhole of your guitar. It can switch between active and passive modes. In active mode, the preamp is activated, providing high-quality sound. The patented 3D body sensor captures the vibrations of the entire guitar body, delivering a more natural acoustic sound. It's resistant to feedback and features volume control and a battery check function. It runs on one CR2032 battery for approximately 300 hours. I purchased it because it doesn't require drilling a hole in the guitar. I have confirmed the sound output, and it produces the rich sound unique to acoustic guitars. I only used it for a test strum, so while it's not new, it's in like-new condition. All accessories are included. Thank you for your interest.