Features:

End-pin pickup, 6.35mm / 0.25in durable jack, minimize damage to instrument body.
With volume control, mounted at the inside edge of the sound hole.
Powered by 9V battery, also comes with a mini battery bag for storage.
Acoustic Guitar Endpin Jack Preamp Piezo Pickup with Battery Case.
Small size and easy to use.
Good sound, volume control and powerful output.
Suitable for acoustic folk ukulele guitar, mandolin, classical guitar and cigar box guitar.

Specifications:

Color:Black 
Material: Metal+Plastic
Need a 9 volt battery power supply(not included)
Size:As picture shown(approx)
Quantity: 1 set
Weight:60g
SKU:GP0908-321

Package List:
1*Pickup
1*Mounting base
1*Bag
1*Cable tie(other accessories demo in the picture is not included)

Notes:

Please allow 1-2cm error due to manual measurement. 
Due to the difference between different monitors, the picture may not reflect the actual color of the item.