Philips 21PT5307/60, 21", 4:3, 21.7" (55 cm), 20.1" (51 cm), 100 channels, 2 W Philips 21PT5307/60. Display diagonal: 21", Aspect ratio: 4:3, Display diagonal (metric): 21.7" (55 cm). Channels quantity: 100 channels. RMS rated power: 2 W, Peak Music Power Output (PMPO): 20 W, Music power: 20 W. Power consumption (typical): 60 W, Power consumption (standby): 3 W. Teletext: 1 pages