Digital Contact Tachometer DT2235A contact tach:0.5-19,999 rpm, surface speed:0.05-1,999.9m/min Digital Contact TachometerModel: DT2235AShenzhen Sanpo Instrument Co.,Ltd (A1) Basic functionDT2235AGeneral featuresDT2235ADisplay5 digits white backlight LCDBattery type3 X 1.5V AA batteryDetector typecontactProduct dimension160*72*37mmContact tach range0.5~19,999 RPMUnit weight170g with ...