Features:

Patch style pickup system for acoustic guitars.
Pick up clear and crisp musical instrument sound, no sound attenuation and tone distortion.To restore the true voice, high sensitivity.
Sound hole controller with volume and tone adjusting knobs.
6.35mm full copper output jack for connecting amplifier to get more powerful guitar sound.
Easy to install,no damage to the instrument body. ideal for guitar players' street and stage performance.
It has the advantage of being able to eliminate interfering external sounds and not being influenced by sound reflections from nearby objects.

Specifications:

Material:metal+plastic+wire
Fit for:acoustic guitar
Size:as the picture shows
Weight:30.6g
Output:6.35mm
SKU:GP0908-326

Package List:
1*Patch style guitar pickup

Tips:
What is the little square plastic piece for ?
You can thread the wire tie thru it in place, then stick the square out of the way and secure the excess cable to it.
How to use the Self-adhesive ?
Remove the plastic film from the back of the transducer to expose the adhesive.