1. my box model is P768, which could sustain 110 ~ 250V, even though there is some deviation regarding the power statement on the user manual and on the rear label.
2. call their support technician, no kidding, I did it before and the answer is positive.
3. the last resort is you find a power transfomer, which is 220v to 110v, to connect your DVD player to its 110v output, it's a little bittle funny though, but it could give me triple assurance, and I also did before.