Philips 21PT6257 21" real flat stereo TV. Display diagonal: 533.4 mm (21 "), Aspect ratio: 4:3, Display: Real Flat picture tube. Analog signal format system: NTSC. Audio system: Incredible Surround Stereo SAP, RMS rated power: 2 W, Sound enhancement: Auto Volume Leveller Ultra Bass. Colour of product: 2-tone grey. Power consumption (standby): 3 W, Power requirements: AC 90-140V, 50/60Hz