Philips 21PT5433 21" real flat TV, 53.3 cm (21"), 4:3, Real Flat image tube, 53 cm, 51 cm, NTSC, PAL BG, PAL M, PAL N Philips 21PT5433 21" real flat TV. Display diagonal: 53.3 cm (21"), Aspect ratio: 4:3, Display: Real Flat image tube. Analog signal format system: NTSC, PAL BG, PAL M, PAL N, Supported radio bands: PLL. Audio system: Incredible Surround, SAP, Stereo, RMS rated power: 2 W, Sound enhancement technology: Auto Volume LevellerUltra Bass. Product colour: Silver. Remote control type: RCLB014