Pen Tube Style Acoustic Guitar Undersaddle Pickup Active Pickup Volume and Tone Controls with Pickup Piezo Rod Only for Acoustic Guitar Active pickup, low noise, delicate sound, uniform timbre, stable transmission of sound. Features: High Performance, Strong Gain:Adopt the active system, plug and play. independent volume & tone control. The guitar pickup has advantages of higher reduction and sensitivity, better anti-noise ability and no sound breaking. High Fidelity Sound:The active pickup can more effectively restore the real sound quality, ensuring the uniform picking-up of every string, without sound breaking, letting you enjoy wonderful music. Independently pick up the sound of acoustic guitar, simple installation, lightweight design, energy-saving. The guitar pickup is specially applied to acoustic guitar. Comes with a nylon battery bag for convenient battery replacement. Power supply is from external 9V alkaline battery ( not included). Specifications: Model: PJG-02 Active Power Jack System Pickup Input Impedance: 20M Ohms Output Impedance: 1K Ohms Current Drain: 770uA Tone Control Range: ±0dB -6 at 10KHz Cable Length: Approx. 330mm / 13inch Endpin Size: 15mm diameter, 92mm length Pickup Part Size: 100mm length Plug Diameter: φ2.5mm Power Supply: Compatible with 9V alkaline battery Item Weight: 50g / 1.8oz Package Size: 15 * 10 * 4cm / 5.9 * 3.9 * 1.6inch Package Weight: 92g / 3.2oz Packing List: 1 * Guitar Pickup 1 * Pickup Piezo Rod 3 * Double Sided Tape 1 * Nylon Battery Bag Note: Battery is not included in the package.