DESC: Provideo VM-2105C 21 inch color monitor has audio capability with more than a 450 line resolution. It features convenient front controls, looping video input/output, and comb filter for enhanced picture quality. It is encased in rugged metal cabinets. It is UL listed. Technical Specifications CRT Size 21" color Resolution Center: 1000 TV lines, Corner: 800 TV lines Scanning Frequency EIA standard 15.75 kHz horizontal, 60 Hz vertical Linearity +/- 10 % horizontal, +/- 10 % vertical Input Signal 1.0 Vp-p composite, video, sync negative Video Gain 33 dB Input BNC Connector, Switchable 75 ohm/High impedance Power COnsumption 35 watt Operating Temperature 32 degrees F - 140 degrees F Input Voltage AC 110V/60 Hz Housing Color metal Dimensions 19 1/2" H x 19 1/4" W x 18" D