Features dual-channel system that combines single coil magnetic pickup & condenser mic, effectively reduces noise, ensures acoustic clarity. Volume control, mic volume level adjustment, pickup tone setup, mic tone adjusting, phase switch are available, for desired sound effect. USB rechargeable pickup has 500 mAh high capacity battery inside, supports long standby to 100h after once 2h full charging. Stylish guitar preamplifier, suitable for acoustic guitar with 80mm-120mm wide soundhole, allow for easy installment by a few steps. Guitar pickup can be firmly mounted on instrument by included accessories and connected to external amplifier via cable with 1/4 jack. Material:Plastic + electronic components colour:Black Package Contents: 2 * Pickup 2 * Fixture Leather Pad 2 * Cable with 1/4 inch Jack 2 * Screwdriver 4 * Washer 4 * Wire Clip 2 * USB Charging Cable 2 * English manua 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.