Features Support preset: the counter relay has the preset function R, N, C, F, B, E, and the relay of the timer has four output modes. Power off memory: supports the power stop memory function with an independent relay alarm output that you can use with confidence. Technical parameters: power supply from 100-240 VAC, relay power is 250 VAC 3A, counting range from 0.001-9999, input method adopts electric shock signal or pulse signal. Non-interference sensor: strong interference resistance, equipped with rotary encoder input, power switch and NPN sensor. 4-digit display: 4-digit counting and time unit, features a bright, high-resolution digital display. Specification: Item Type: Digital Timer Counter Power supply: 100-240VAC Plate size: approx. 48 x 48 mm / 1.89 x 1.89 inches. Hole size: approx. 45 x 45 mm / 1.77 x 1.77 inches. Display mode: 4-digit digital LED tube display Relay power: 250VAC 3A Counting range: 0.001-9999 Input method: electric shock signal or pulse signal Package list: 1 x meter counter. 2 x accessories. 1 x user manual (English language not guaranteed). Small note: Please pay attention to electrical safety before use. Package List 1 x Meter Counter 2 x Accessories 1 x User Manual