Mextech DT-2236C LASER & CONTACT Digital Tachometer, Range: 2.5 to 99.999rpm

Specifications : Brand : MEXTECH Display : 5 Digits, 10 mm Tachometer Range :  0.5 to 19,999 RPM Accuracy : ±(0.05% 1） Resolution : 0.1 RPM Surface Speed : 0.5-1999.9 m/min Power Supply :  4 x 1.5 AA Battery Model No : DT‐2236C