Air Speed Anemometro Data Hold Non-Contact Digital Professional Tachometers

Features?
Display Count?99999
Data Hold? √
Auto Power Off? Around 15 Minutes     
Low Battery Indication? ≤4.8V     
MAX Mode?√
MIN Mode?√          
AVG Mode?√    

Specifications?
Model?UT371
RPM Range?10RPM?99RPM ±(0.03%?
           100RPM?999RPM ±(0.04%?2?
           1000RPM?9999RPM ±(0.04%?2?
           10000RPM?99999RPM ±(0.04%?2?
          
Counts Range?0?99999
Max.Input Frequency?10KHz,Bandwith:5%
Target Distance?50mm ?200mm 

General Characteristic?
Product Net Weight: 100g
Product Size: 184mm * 56mm * 34mm
Power?1.5V Alkaline Batteries?LR6?* 4 ?not included)
LCD Size: 53mm * 41mm
Product Color: Red and Grey
Package Size: 27.3 * 14.7 * 4cm / 10.8 * 5.7 * 1.5in
Package Weight: 227g / 8.1oz

Packajge List:
1 * UNI-T UT371 Non-Contact Tachometer
1 * English Manual