Product_description: ['Product Overview The F35-1-91-0 is a 3-1/2-digit Digital Panel Meter with bright red LED display and 1/8 DIN indicator. It offers 120VAC power supply and 20 to 199.9Hz RMS function/range. Front panel pops OFF for easy decimal point setting and display scaling Optional excitation output Only 3.12 required behind panel Applications Industrial, Clock & Timing, Test & Measurement No. of Digits / Alpha: 3-1/2 Meter Function: Frequency Meter Range: 20Hz to 199.9Hz Digit Height: 14.2mm Panel Cutout Height: 44.96mm Panel Cutout Width: 91.95mm Supply Voltage Min: 108VAC Supply Voltage Max: 132VAC Operating Temperature Min: 0°C Operating Temperature Max: 55°C'] (Page 1)