Philips 21PT6456 21" real flat TV. Display diagonal: 533.4 mm (21 "), Aspect ratio: 4:3, Display: Real Flat picture tube. Video playback: NTSC PAL (all versions). Analog signal format system: NTSC PAL (todas las versiones) NTSC PAL N PAL M. Audio system: Incredible Surround Stereo SAP, RMS rated power: 2 W, Sound enhancement: Auto Volume Leveller Ultra Bass. Colour of product: Silver Frost y negro