Max. display:5 1/2 digital
Photo/contact tachometer (laser) 1 RPM (over 1,000 RPM) Power:1.5V AA type battery* 4
AUTO Ranging Sampling time:0.5 sec(over 120RPM) Memory:Last value,Max. value, Min. value Measuring Range: ① Photo tach:2.5 to 99,999 RPM ② Contact tach:0.5 to 1999.9 RPM(m/min) ③ Surface speed:0.05 to 19999 RPM(m/min) Accuracy:(0.05%+1) Resolution:0.1 RPM (2.5~999.9 RPM)