Features:

• Model: DT-2234C+
• 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 Quartz Crystal Oscillator
• Range Selection: Auto range
• Sampling Time: 0.8s(over 60RPM)  
• Power Supply: 1 * 9V 6F22 Battery(NOT included)
• Power Consumption: Approx. 30mA
• Working Temperature: 0℃ ~ 50℃(32℉ ~ 122℉)
• Item Size: 130*68*26mm / 5.1*2.7*1.0in
• Package Weight: Approx. 150g / 5.3oz