This item is fitted for two sensor head inputs only. Readout is via large LEDs with a touch pad front panel. There are three range switches: 0-10; 0-30; 0-300 V/m. Sensor sampling is selected from 1-16 samples/sec. There is an analogue output of 0-5vdc proportional to the full range selected. There are both RS232 and IEEE-488 interface buses when incorporated as part of a PC controlled monitoring system. The unit is mains powered and comes in a customised container.