Toptronic Digital Tachometer T6236

Photo/contact; Removable contact head; Backlight; Memory Last/Max/Min value; Measurement and Range: Photo: 2.5 to 999999 RPM, Contact: 0.5 to 19999 RPM, Surface Speed (m/min): 0.01 to 99.99 m/min; Resolution RPM: 0.1 (0.5 to 999.9 RPM); Resolution M/Min: 0.01 (0.05 to 99.99 m/min); Display 5 Digits, 18mm LCD; Accuracy +/- 0.05% + 1 Digit; Power Source: 4 x 1.5V AA Batteries;