Share 'How To Operate B-Band AC1.5T Electronics in Seagull's Natural Elements Line?'

What kind of battery does it use? Does the guitar have to be plugged into an amp for the tuner/preamp to work? How does one turn the thing on? My Seagull Mini-Jumbo Spruce/Heart of Wild Cherry Natural Elements guitar arrived yesterday.  Beautiful guitar, but no instruction manual came with it.  I don't know if the batteries are dead, or if something is supposed to click when I push/turn a button…