Ir touch frame Model:tt-42 Size: 42í¦(16:9)(optional) Touch precision: 8192*8192 Writing styles: hand/pen Light transmittance: í²92% max:100%(no glass) Position accuracy: ín 0.2mm Anti-light intensity: direct under the sunlight Data connector:usb2.0/wireless rf2.4g/rs232(optional) Power supply: by usb, no need other cable. Cusor speed: ¿r125 dot/s Transmission speed:12m/s Scan speed: first dot 25ms, following dot 8ms From 19" to 72"