... with the function of protection)AC/DC Voltage0-660V automatic/manual measure, the mini resolution reaches to 0 ... .1mVAC/DC Current660uA , 6.6mA, 66mA , 660mA, 10AResistance660, 6.6k, 66k, 660k, 6.6M, 66MΩCapacitance test6.6nf~66000uF, 1pf mini ... -66000 ~ +6600PTZ control testCommunication InterfaceSupport RS232/RS485 simultaneouslyProtocolcompatible with Pelco-D / P, Samsung, Panasonic, Lilin, Yaan ...