Counter, Number of Digits 8, LCD Display, Character Height 0.32 in, Max. Counts per Second 40 Low Speed Mode, 500 High Speed Mode, Input Signal DC Voltage: -0.5VDC to 30VDC Absolute Voltage Range, 3VDC VIH, 1VDC VIL, High Voltage AC/DC: 300VAC/VDC Absolute Voltage Range, 10VDC/20VAC VIH, 3VDC/VAC VIL, Output Rating Not Applicable, Mounting Panel with Clip, Diameter Not Applicable, Height 1.1 in, Width 2 in, Power Required Battery, Min. On/Off Pulse 12.5 msec (Off), 12.5 msec (On)