8-Pin Plug Type Digital Counter, Display: Uses a 7-segment LED display to 4 digits, with font size W3.8 x H7.6 mm., Operating methods: Supports both modes of operation: .count-up and count-down, Counting speed: The maximum counting rate is selectable via internal DIP switches between 1 cps, 30 cps, 2 kcps and 5 kcps., Feeding: Accepts a wide supply voltage range of 100-240 VAC (50/60 Hz)., Output: Features a relay output (SPST, 1a) with a contact capacity of 250 VAC, 3A resistive load., Memory: It is equipped with a memory protection function that ensures data retention for about 10 years (using non-volatile semiconductor memory)., Signal input: You can select the signal input method between voltage input (PNP) or non-voltage input (NPN).