... ,reasonable price,size:42'',type:Advertisin 42'' stand LCD Advertising Monitor Technical Parameters:(for selection32″, 37″, 42″, 46″, 52″, 55″, ... : 2000:1; Response time: 4ms; View angle: 178°/178° (horizontal/vertical);SpecificationPower output: +5V, +12V~+24V;Working current: 300MA (12V);Power ... , the multimedia teaching, information guide, exhibition use etc. 42'' stand LCD Advertising Monitor