Digital Voltage/Current Meter Dual Input & Display (96x48mm): Measuring dual channels (isolated) Voltage 0 100mV 600V and Current 0~199.99 10A for DC AC TRMS mixable. Mathematic function available for Addition Subtraction Multiplication Division high or low selector in 2 channels input in option. 4 relay can be multi-cross programmed individual to be a Hi Lo Hi Latch Lo Latch Go energized with Start Delay Hysteresis Energized & De-energized Delay functions, or to be a remote control. Analogue multi-cross selection output and RS 485 communication port in option