English ...AppendicesSpecificationsThe specs specified below are subject to change without notice. Regarding the final specs,please refer to Acer accounced marketing specs.Light Valve - Single Chip DLP TM Technology by Texas InstrumentsLamp - 200W User Replaceable Lamp(for XD1170/XD1270 series)- 230W User Replaceable Lamp (for XD1280 series)Number of Pixels - 800 pixels(H) X 600 lines(V) (for XD1170 series only)- 1024 pixels(H) X 768 lines(V)(for XD1270/XD1280 series)Displayable Color - 16.7M colorsContrast Ratio - 2000 : 1 (Full On/Full Off)Uniformity - 85%Noise Level - 31dB(A)(standard mode/27dB(A)(ECO mode)(for XD1170/XD1270 series)- 33dB(A)(standard mode/30dB(A)(ECO mode)(for XD1280 series)Projection Lens - F/2.7~3.0 f=21.83~23.81mm with 1.1x Manual zoomlensProjection Screen Size (Diag.) - 34.7 to 304.9 inches (0.88 to 7.75 meters) DiagonalProjection Distance - 4.9 to 39.4 feet (1.5 to12.0 meters)Video Compatibility - NTSC 3.58/NTSC 4.43/PAL/SECAM and HDTVcompatible- Composite video & S-Video capabilityH. Frequency - 31.5kHz~100kHz horizontal scanV. Frequency - 56Hz~85Hz vertical refreshPower Supply - Universal AC input 100-240V; Input Frequency50/60Hz