Mark

I don't own a WK3500 but I would think your question[s] would be addressed in the Manual or possibly on the Casio Support site. Btw,
your PSR 730 might have lasted through a couple pints of Guiness but don't expect your Casio to do the same thing. I agree with you though that the WK3500 is a great little Keyboard for the money and it even has 76 Keys!

Best regards,
Mike
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Yamaha Genos, Mackie HR824 MKII Studio Monitors, Mackie 1202 VLZ Pro Mixer (made in USA), Cakewalk Sonar Platinum, Shure SM58 vocal mic.