basic features

■suitable for elevator speed measurement of high building
■2 independent displays
■analog output teminal to record 卡塔尔世界杯中国足球赛事 data
■2 external hold terminals for remote control
■memory function (max.10sets data)
■averaging count function
■easy to read led displays
■auto power off (3min.) (extendable to 1hr.)
■low battery power alarm