Features 4 DIGIT DISPLAY: 4 digit counting and timing unit, possess bright high definition digital display NON INTERFERENCE SENSOR: Strong interference resistant ability, equipped with rotary encoder input, power switch and NPN sensor POWER OFF MEMORY: Support power stop memory function, with an independent relay alarm output, you can use with confidence SUPPORT PRESET: The relay of the counter has the R, N, C, F, B, E preset function, and the relay of the timer has four output modes TECHNICAL PARAMETERS: Power supply from 100‑240VAC, relay power is 250VAC 3A, counting range from0.001‑9999, input method adopts electric shock signal or pulse signal Specification: Item Type: Digital Timer Counter Power: 100-240VAC Panel Size: Approx. 48 x 48mm / 1.89 x 1.89in Hole Size: Approx. 45 x 45mm / 1.77 x 1.77in Display Mode: LED 4 digit digital 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 Note: Please pay attention to electricity safety before use. Package List 1 x Meter Counter 2 x Accessories 1 x User Manual