Specifications:
Color: Dark Grey
Material: ABS PLastic
Display: 5-digit 18mm(0.7") LCD Display
Measuring Range: 2.5RPM - 99,999RPM
Resolution: 0.1RPM at 2.5-999.9RPM, 1RPM at 1000-99,999RPM
Accuracy: ±(0.05%+1 digit)
Measuring Distance: 50-500mm / 2-20in
Time Base: 6MHz Crystal Oscillator
Test Range Select: Automatic Switching
Sampling Time: 0.8s(over 60RPM) 
Function: Display Last Value, MAX. Value, Min. Value
Power Supply: 1 * 9V 6F22 Battery(NOT Included)
Power Consumption: Approx. 30mA
Working Temperature: 0℃-50℃(32℉-122℉)
Product Size: 130 * 70 * 29mm / 5.12 * 2.76 * 1.14in
Product Weight: 79g / 2.80oz
Package Size: 15 * 9.3 * 5cm / 5.91 * 3.66 * 1.97in
Package Weight: 113g / 4.00oz

Note:
1. You must stick the reflective tape onto the target object before measuring.
2. Do not point the laser beam towards eyes directly; safety eyewear is recommended.
3. Do not use it near explosive gases or in other potentially explosive areas.

Package List:
1 * Digital Tachometer
3 * Reflective Tape Marks
1 * User Manual(English)