Fishman Presys - Acoustic Preamp with Pickup & digital tunerPresys Features:• Built-in tuner with LED display• Smaller footprint than standard size preamps• Volume control• Bass, Middle and Treble control knobs• Phase control button• Low battery indicator (9V battery)• Flip-top housing to access integrated battery compartment• Pre-wired Fishman Sonicore pickup for quick installation• Low profile control knobs• Dimensions: 2.19"(55.75mm) W x 3.19"(81mm) Hจำหน่ายที่ ชุดละ 2500 ครับผมอ่านเพิ่มเติม