Features: This guitar preamp features a unique transmission system that vibrates the guitar body as you play, enhancing sound resonance and dynamics without an amplifier. Its DOUBLE reverb effect module creates innovative tones. Bluetooth connectivity lets you play along with background music. The dual-pickup system (piezo + microphone) captures detailed playing while enriching sound depth. Specifications: Material: ABS Battery: 1 �� 2000mAh rechargeable Size: 90 �� 50 �� 45mm / 3.54 �� 1.97 �� 1.77in Weight: 207g / 7.30oz Package: 357g / 12.59oz, 17.5 �� 12 �� 6cm / 6.89 �� 4.7 �� 2.36in Package Includes: 1 �� Pickup 1 �� End-Pin Jack 1 �� Vibrating Horn 1 �� Pickup Wire 1 �� Type-C Cable 2 �� Clips Note: Requires drilling for installation. Microphone needs speaker connection to function.