... .4-digit LED indicators, small counter2.Count-up, Thumb switch3.Counter, meter, 4.CEFeatures :1. count-up2. 1 preset, 1 way ... *45Display units4-digit LED indicatorsCounting frequency30Hz~2KHzRange1~9999Input signalContact input, Impulse level,Input channel1 input channelOperation methodCount-upOutput modeF, CReset / ZeroManually ...