mt crashed at last show. charged fresh full 6 hours charge done & full battery indicated, get to show . battery shows no charge.set up 4 aa battery back-up. mt freezes during tapeing.i sent unit back to m-audio, mt replaced free of charge due to battery recall. pay attention. eyes!!!!! go to guysonic's post you only get what you pay for. real sled needed for real success. alway greatful eyesotw