2X EQ-505R Acoustic Guitar 3 Amp Assembly Preamp Equalizer Piezo PickupEQ-505R, piezo pickupPower: 9V alkaline battery, battery is not here. With this preamp, you spend less time pinching controls and more playing time. A rod-shaped piezo transducer is included, it attaches with a small jack plug so that it can be removed if necessary. It can be easily fitted into your acoustic and cigar box guitars, it is important to electrify and amplify their sound. Color: BlackMaterial: ABS Package Size: 15x10x5cmPackage Contents: 2 x Pickup2 x Pickup Stick2 Pack x Mounting AccessoriesOnly the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement error is +/- 1-3cm.