70 inch interactive touch screen display monitor.It made in RS-232 serial line connected to port low rate as a standard string to increase communication distance of the standard single-ended communication line. The maximum transmission distance is about 15 meters, and the maximum speed is 20kb / s .RS-232 is point to point ( i.e., only a pair of sending and receiving apparatus ) the communication and designed, low load drive, only for the communication between the local device. It is an unbalanced transmission method. In order to better meet the infrared touch requirements, here using the RS - 422 standard serial line connection port for transmission. The RS - 422 standard name is "balanced voltage digital interface port electrical characteristics of the circuit ", which defines the access opening characteristics of the circuit. It made to use Gao input impedance of the receiver, the transmission drive ratio of the RS - 232It has stronger driving ability, so it is allowed to connect multiple receiving nodes on the same transmission line, and it can connect up to 10 nodes. I.e., a master device (Master), the remainder from the device (Salve, the devices can not communicate, the RS-422 to support point-to-many two-way communication. The RS -4 22 is the most large transmission distance of 4000 feet ( about 1219 yards ), The maximum transmission rate is 10Mb / s .

70 inch interactive touch screen display monitor.It made in RS-232 serial line connected to port low rate as a standard string to increase communication distance of the standard single-ended communication line. The maximum transmission distance is about 15 meters, and the maximum speed is 20kb / s .RS-232 is point to point ( i.e., only a pair of sending and receiving apparatus ) the communication and designed, low load drive, only for the communication between the local device. It is an unbalanced transmission method. In order to better meet the infrared touch requirements, here using the RS - 422 standard serial line connection port for transmission. The RS - 422 standard name is "balanced voltage digital interface port electrical characteristics of the circuit ", which defines the access opening characteristics of the circuit. It made to use Gao input impedance of the receiver, the transmission drive ratio of the RS - 232It has stronger driving ability, so it is allowed to connect multiple receiving nodes on the same transmission line, and it can connect up to 10 nodes. I.e., a master device (Master), the remainder from the device (Salve, the devices can not communicate, the RS-422 to support point-to-many two-way communication. The RS -4 22 is the most large transmission distance of 4000 feet ( about 1219 yards ), The maximum transmission rate is 10Mb / s . IQTouch K interactive touch screen feature 20-point touch and dual system -- Android 8.0 system and optional OPS Windows 10Pro system. Its 4K UHD resolution facilitates presentations and collaboration. With optional multi-screen casting software, IQClass 6.0 and installation-free IQClass Plus software, IQTouch K Series can help create an interactive and collaborative teaching atmosphere in class.