Features: 4-in-1 Multifunction Pickup -- Magnetic and microphone pickups, acoustic coverage enhancer, reverberation and delay effect, BT connection. The equipped BT module makes it easy to play the accompaniment music or drum machine rhythm via BT connection without connecting a loudspeaker box. Simple Operation -- 4 rotating knobs for conveniently control the magnetic pickup volume, the reverberation effect, the delay effect, and the microphone pickup volume. To use the acoustic coverage enhancer, you need to unplug the cable that was inserted into the output jack. Easy Installation & Use -- No punching required, easy and convenient installation, does no damage to your guitar, just adjust the screws at both ends of the pickup to clamp it to the sound hole. There are 2 output interfaces for connecting the equipped BT module and output jack line. Strong Endurance -- High capacity rechargeable lithium battery ensures continuous working time, which is great for outdoor activities and performances. Easy to connect the battery to the pickup via the battery line input interface, and charge the battery via the Type-C interface in the pickup. Lightweight & Concise Appearance -- Mini size and lightweight, not too much burden to the guitar player. Natural wood color, smooth surface and round edges without burr, simple and elegant appearance, adding a sense of pureness to your guitar. Selected material ensures high strength and great durability. Note: 1. Please read the user manual carefully before use. 2. Size and color may be slightly different due to manual measurement and different light conditions. Thanks for understanding. Specifications: Color: Wood Color Material: Wood + Plastic Battery: 3.7V 1100mAh Lithium Battery Item Size: 104 * 30 * 37mm / 4.09 * 1.18 * 1.46in Item Weight: 71g / 2.50oz Package Size: 18 * 10 * 6cm / 7.09 * 3.94 * 2.36in Package Weight: 351g / 12.38oz Package List: 1 * Pickup 1 * Lithium Battery & Pouch Kit 1 * Type-C USB Cable 1 * BT Module 1 * Output Jack Line 1 * Pack of Installation Kit 1 * User Manual (English)