Features:
Able to perfectly reproduce the original sound of the guitar.
Magnetic sound-absorbing， can best pick up the guitar sound.
Convenient positioning， held tightly by tightening the screws.
Suitable for acoustic guitar with 3 11/16" and 4 1/8" (94-105mm) diameter sounds hole.
Sponge lines the inside edges of both mounting brackets against sliding and damage to guitar.
Easy installation and removal. 

Specifications:
Material: Iron， copper
Color: Black
Resistance: 5.5-6.5kΩ
Jack type: Strap end-pin jack
Cable length: 80cm / 31.5in
Product size: 11.5 * 9.5 * 3cm / 4.5 * 3.7 * 1.2in
Product weight: 163g / 5.8oz
Package size: 12 * 10 * 3cm / 4.7 * 3.9 * 1.2in
Package weight: 182g / 6.4oz

Package including:
1 * Sound Hole Pick-up
1 * Plastic Collector