Here is what Vintage say...
'This Dreadnought Cutaway Electro guitar has all the great features of the Fishman Isys + preamp with a mini USB output to connect the guitar directly to a USB compatible device.
Isys + Features:
• Onboard easy to read 7-segment LED tuner
• Bass & treble controls for enhanced tone shaping
• Smaller footprint for easy access to controls
• Volume control
• EQ shaping control
• Phase control
• Low battery indicator (9V battery)
• Surface mounted battery compartment
• Pre-wired Fishman Sonicore pickup
• Low profile control knobs'