... 4. interference resistance 5. relay or transistor output Digital counter, multifunctional counterFeatures1. Setup and output of two ... or transistors: NPN or PNP);2. 6 kinds of output logic: F, N, R, C, L, K, Q, ... capacity;9. Double-row 4-bit, 6-bit LED digital display;10. Multiple dimensions: 48WX48H, 72WX72H or 96WX48H ... six numbers, parameter modification buttonOrdering information Digital counter