Philips 20PT4331 21" stereo TV. Display diagonal: 508 mm (20 "), Aspect ratio: 4:3, Screen format adjustments: 4:3 4:3 expand. Video playback: NTSC. Analog signal format system: NTSC. Audio system: Incredible Surround SAP, RMS rated power: 2 W, Sound enhancement: Ultra Bass. Colour of product: Techno Silver