This is a contoured microphone for converting an acoustic guitar into an electro-acoustic guitar. Ideally, it should be installed in three places: on both sides of the back of the soundhole and near the bottom of the back of the soundhole❣️ You can easily attach it with the adhesive by peeling off the sticker on the back of the microphone❣️ Basically, remove the strap end pin, widen the hole to fit the shield jack, and secure it tightly with the screw❣️ The included adhesive sheets can be used to fix the wires in several places, and you're done‼️ Quantities are limited, so if you're interested, please don't delay‼️ ※We also offer conversions of acoustic guitars we sell into electro-acoustic specifications, so please inquire※