Philips RealFlat 27" Flat-Tube Standard-Definition Digital TV with Component Video Input - Model: 27PT9015D/37 4:3 aspect ratio for viewing standard TV in fullscreen format Alloy invar shadow mask helps maintain a sharper focus and eliminates 'color blooming' that is common on standard tubes Active control ensures improved viewing by continually adjusting picture settings more than 3,000 times per minute BlackStretch circuitry extends black levels in bright scenes for enhanced picture contrast and detail Other convenient features include an electronic program guide for retrieval of program schedules, AutoPicture to personalize your viewing of various TV programs, closed captioning, sleep timer and trilingual on-screen menu