... format: AUTO/NTSC/PAL is optional. -Audio output: stereo L/R, 5W*2, 8Ω -Power supply: AC 110V 240V, 50/60HZ ... 50000 hours55 inch Max. Brightness: 500cd/m2 Contrast Ratio: 2000:1 Responsive Time: 8ms Product Features and Technique Parameter:-Outer shell ... , B->T, T/B->C, C->T/B, BLD:T->B, L->R, R->L, L/R->C, C->L/R, Implode,BLD:L->R, fade in and out ...