Dimension: 83mm X 37 mm X 51 mm Input: 4-20mA, 0-5V, 0-10V, 0-75mv, 0-+/-5V, 0-10mA, etc Output: RS232 or RS485 Digital Signal Amount of Channel: 2-4 Channel Transport Package: Carton Specification: CE, RoHS, ISO9001: 2008