Adjustable Volume 12 Hole Sound Pickup Microphone Wire Amplifier Speaker for Acoustic Guitar With Connection Wire Guitar

nullFeatures:Adjustable volume;Suitable for large-scale stage performances;Home use;Enough for rehearsals;Specifications:Power supply: power supplied by loudspeaker box, no need of batteryInstallation method: manually clipped in the guitar sound holeOutput line interface: About 6.5mm mono straight plugLength of connecting wire: about 3 meters/9.8ftNet weight: about 129gGross weight: about 207gProduct size: 130 X 70 X 14mm/5.12 X 2.76 X 0.55" (L X W X H)Packing size: 137 X 98 X 38mm/5.39 X 3.86 X 1.50" (L X W X H)