1. Material: electronic, ABS 2. Scope of application: guitar 3. Battery: 1x6F229V (not included) 4. Output: 6.35 audio head output, directly connected to speakers 5. Installation: Installation with a hole on the side of the guitar 6. Adjustable channels: 4-band equalization BASS/MIDD/TREB/PRES 7. Function: low, medium, high, super high and volume switch, battery detection light 8. Packing list: pickup stick x1, screw x4, washer x1, screw cap x2, suction cup x1 9. Features: tuning function, tuning adjustment, clear pickup, volume control, with tuning display, with Canon interface, beautiful screen width 10. Weight: about 124.4g 11. Size: about 10.3x4.6x6 cm