Features: X0 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 time up 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. Specifications: Brand: DOUBLE Model: X0 Material: Plastic + Electronic Components Color: Black, Red, Blue, Orange, Steel Blue (Optional) Power Supply: 3.7V 500mAh Lithium Battery Product Weight: 144g / 5.07oz Product Size: 11.5*3*3cm / 4.52*1.18*1.18in Package Weight: 247g / 8.71oz Package Size: 14.5*9*5cm / 5.70*3.54*1.96in Note: Pickup set only, other accessories in the pictures are not included. Please read the user manual carefully for more information before usage. Due to manual measurement, there may be deviation, please in kind prevail. Due to lighting or other reasons, the picture and material object may slightly differ. Packing List: 1 * Pickup 1 * Fixture Leather Pad 1 * Cable with 1/4 inch Jack 1 * Cross Screwdriver 2 * Washer 2 * Wire Clip 1 * USB Charging Cable 1 * User Manual