Specification :

Display:5 digits LCD display
Units:rpm,rps
Measuring range:100~30000RPM,1.7~500RPS
Resolution:
0.1rpm(100~999.9rpm),0.1rps(1.7~100rps)
1rpm(1000~30000rpm),1rps(100~500rps)
Accuracy:±(0.1%n+5d)rpm; (100~9999.9rpm)
±(0.02%n+2d)rpm;(10000~30000rpm)
Sampling rates:1/sec
Detecting distance:3.9~15.7(100~400mm)
Auto power off :10 minutes idle
Accessory:3x reflective tape mark(total23)
Power supply:3x1.5V AAA
Size:4.8*2.2*1.1cm
Weight:105g