Enhance your guitar's sound without the need for plugins or external effectors using cutting-edge frequency vibration technology. Experience rich reverberation, chorus, and delay effects all in one device. Features: Sound hole vibration pickup with reverberation, chorus, and delay effect Independent controls for magnetic coil, volume, microphone, and phase Ergonomically designed for user-friendly control Amplifies the guitar's natural sound by 30-50% with a same-frequency resonance system Unplugged playing with DSP reverberation effect Cork pad clamp protects the instrument's finish Easy installation in the sound hole without drilling Specifications: Material: ABS Battery: 3.7V 2000mAh Suitable for sound holes: 96-104mm diameter Package Weight: 485g (17.11 oz) Package Size: 17.5 x 15.2 x 5.5 cm (6.89 x 5.98 x 2.17 in) Packing List: 1 x Pickup 1 x Tail Nail Leather Cover 1 x Output Tail Nail 1 x Vibrating Horn 1 x Screwdriver 1 x Cable 2 x Clip 2 x Gasket