Feature: 1. By changing the audio frequency of pickup channel to suppress the resonant horn whistling, and simplify the installation and debugging on various guitars. 2. Equipped with a rechargeable battery, you can use the USB cable to have a convenient and quick charging through the charging port on the pickup panel. 3. Built‑in high‑speed high‑fidelity audio digital DSP module, which is able to achieve the expansion of reverb, chorus, delay and other sound effects, making the sound fuller and more beautiful. 4. Use the flat‑panel speakers attached to the inside of the guitar to make the guitar cabinet vibrate and produce sound, achieve DSP sound effects, and increase the resonance volume of the guitar cabinet. 5. Built‑in independent omnidirectional microphone finger‑flicking board, low and high two‑stage timbre adjustment; pickup bar low, middle, and high three‑stage timbre adjustment to meet different timbre needs. Specification: Item Type: Guitar Preamp Pickup Material: Metal + Electronic Components Colour: Black Battery Type: 1 x 18650 Rechargeable Lithium Ion Battery (delivered without battery). Package List: 1 x Guitar Preamp Pickup1 x Pickup Stick4 x Knob1 x Recording Cable1 x Hole Sticker1 x Guitar Preamp Pickup Function Panel 1 x USB Cable1 x Mini Cross Screwdriver3 x Socket Nut2 x Cable Clip1 x User Manual3 x Part