Philips 21PT6456 21" real flat stereo TV. Display diagonal: 533.4 mm (21 "), Aspect ratio: 4:3, Display: Real Flat picture tube. Video playback: NTSC. 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: Silver Frost + Black