PN600-14C 14 inches color kinescopes, 450TVL, PAL/NTSC auto-switch, scanning frequency:50HZ(PAL)\60HZ(NTSC), built-in 8Ω3W speaker $120.4 PN600-21C 21 inches color kinescopes, 600TVL, PAL/NTSC auto-switch, scanning frequency:50HZ(PAL)\60HZ(NTSC),built-in 8Ω3W speaker $189.8 PN600-21NP 21 inches pure-flatness color kinescopes,640*480TVL,PAL/NTSC auto-switch, scanning frequency:50HZ(PAL)\60HZ(NTSC),built-in 8Ω3W speaker $238 PN600-14B 14 inches B/W kinescopes, over 800TVL,CCIR/EIA manual-switch, 1 channel audio input/1channel audio circle connection, scanning frequency: 15.625KHz(PAL)-15.75KHz(NTSC) $41.7 PN600-17B 17 inches B/W kinescopes, over 650TVL,CCIR/EIA manual-switch, 1 channel audio input/1channel audio circle connection, scanning frequency: 15.625KHz(PAL)-15.75KHz(NTSC) $102 PN600-21B 21 inches B/W kinescopes, over 650TVL,CCIR/EIA manual-switch, 1 channel audio input/1channel audio circle connection, scanning frequency: 15.625KHz(PAL)-15.75KHz(NTSC) $152.8