Acoustic guitar pickups feature a 12-hole magnetic transducer that captures vibrations quickly. Designed with tone and volume controls for more accurate pickup. Easy to install, put the pickup into the sound hole and adjust the padded metal piece. No drilling required and no scratches to your guitar. For 38inch -41inch guitars with steel strings. Supplied with an audio cable (3.5mm to 6.35mm plug) for connecting to guitar speakers. Audio cable length: about 3meter Commodity weight: 126g Colour:black Material:plastic Size: 14 x 10 x 4cm Package Contents: 1 x guitar pickup 1 x USB cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.