It is a high quality electronics That tool can measure the rotational speed (RPM) acts with wide measuring range and high resolution. It is applicable for measuring: speed of rotating machinery, motors, wheels, lathe for metal or wood cutting works and others.
Applications & Uses : This speed sensing device can be used in automobiles, trucks, tractors, aircraft, trains, light rail vehicles, and automotive.
Features:
Large LCD screen with extra large 5-digit display
Wide measuring range and high resolution
Digital display Gives exact RPM with no guessing or errors
With just fraction of minute Sampling Time (0.8 sec sampling time)
Automatic saving of Last value, Max. value and Min. value and can be displayed by turn anytime
Housed with durable, long-lasting components, lightweight ABS-plastic That insured Maintenance-free performance for Many Years
With High accuracy of ± 0.05%
Uses Microcomputer LSI and crystal time base to offer high accuracy measurement & fast measuring time
Wide Detecting distance
With Low Battery Notification
Carefully shaped to fit comfortably in hand Either
100% Brand New

Specifications:
LCD Display: 5 digits, 18mm (0.7 ") LCD with Annunciation Function
Test Range: 2.5 to 99,999 RPM (r / min)
Resolution: 0.1 RPM (2.5 to 999.9 RPM); 1 RPM (over 1,000 RPM)
Accuracy: ± (0.05% + 1 digit)
Sampling Time: 0.8 sec. (Over 60 RPM)
Test Range selection: Automatic
Memory: Max. value, Min. Last value and value
Detecting Distance: 50 to 500 mm / 2 inch to 20 inch
Time Base: Quartz Crystal
Circuit: Exclusive one-chip of microcomputer LSI circuit
Power Supply: 9V Battery (Not included)
Operating Temperature: 0 Deg C to 50 Deg C (32 Deg F to 122 Deg F)
Size: 131 x 70 x 29 mm

Set Includes:
1 x Digital Photo Laser Non-Contact Tachometer
2 x 600mm Reflective Tape Mark
Operations Manual English