The Selec MF16 Digital Panel Meters-Digital Frequency Meter which can Indicate frequency in operation of equipment, machinery, systems or processes in a wide range of industrial applications. It consists of 4 Digit, 7 segment LED display. Comprises of Input type: 1ø-2 wire with 0.01 resolution. Supply Voltage: 240V (50Hz).  Features 4 digit, 7 segment LED 0.01 resolution