Features 1、Easy To Install: This acoustic guitar pickup is very easy to insert into the sound hole without damaging the body of the guitar, it is suitable for sound hole diameter 90‑105mm, easy and convenient to install, you can choose to install it with or without open hole. 2、Multifunctional: This dual coil soundhole pickup is a passive magnetic soundhole pickup, with adjustable volume and tone, passive acoustic guitar pickup, with a warm and balanced tone, suitable for guitarists' fretting finger style. 3、Dual Adjustment Knobs: This guitar volume tone control pickup features dual adjustment knobs, one to adjust the pickup tone to your individual needs and the other to adjust the pickup volume to your individual needs. 4、Exquisite Appearance: This soundhole pickup has exquisite appearance, with rosewood color design, vintage simplicity, very good looking, no batteries required, suitable for beginners to play fingerpicking, suitable for 39‑42 inches acoustic guitars, not suitable for classical guitars. 5、Sturdy And Robust: This acoustic guitar soundhole pickup is made of excellent rosewood and metal materials, which is sturdy and abrasion resistant, not easy to be damaged, and has a long service life. Specifications: Item Type: Guitar Pickup Material: Rosewood, Metal Tail Nail Output: 6.35mm Pickup Method: Passive Pickup Range: Fingerstyle and Singing Practice Tone: Volume and Tone Control Application: for 39 inch to 42 inch Acoustic Guitar Package List 1 x Guitar Pickup 2 x Fasteners 1 x Leather Case 2 x Screws 1 x Chinese and English Manual