Description : <br>   LUTRON DT-2235A Contact Speed Digital Tachometer &amp;amp; Ft\/Min M\/Min Auto Ranging Including Batteries  <br> Specification :                       DT-2235A                         Range                   0.5 to 19， 999 RPM                         Surface Speed (m\/min.) : 0.05 to 1， 999.9 m\/min                         Surface Speed (ft\/min.) : 0.2 to 6， 560 ft\/min                         Resolution                   RPM                   0.1 RPM                   &amp;lt; 1，000 RPM                         1 RPM                   More than 1，000 RPM                         0.01 m\/mim                   &amp;lt; 100 m\/min                         Surface                   0.1 m\/min                   More than 100 m\/min                         Speed                   0.1 ft\/min                   &amp;lt; 1000 ft\/min                         1 ft\/min                   More than 1，000 ft\/min                         Display                   5 digits， 10 mm ( 0.4&amp;quot; ) LCD                         Accuracy                   +\/- ( 0.05% + 1 digit )                         Sampling Time                   1 second ( 6 RPM )                         Time base                   Quartz crystal                         Circuit                   Exclusive one-chip of micro-LSI circuit                         Battery                    1.5 V AA (UM-3) battery x 2 Pcs(Included battery)                         Operating temp.                   0 to 50C ( 32 to 122F)                         Memory                   Last value， Max. value， Min. value                         Size                   208 x 72 x 37 mm (8.2 x 2.8 x 1.5 inch)                         Weight                   280g (0.62 LB)\/including battery                         Accessories                   Carrying case; 1 PC RPM adapter (CONE); 1 PC RPM adapter (FUNNEL);       1 PC Surface speed test wheel; 1 PC Operation manual; 1 PC surface speed wheel          <br>     Package Includes : <br>    1 x Contact\/Surface Speed Digital Tachometer  2 x 1.5 V AA (UM-3) Battery    1 x Slide-In Contact Adapter   1 x Surface Speed Test Wheel   1 x Funnel Tip   1 x Cone Tip  1 x Operation Manual   <br> Details Pictures :   (Ignore the DT-2235B+ on the pictures， it will send for you the DT-2235A， with the same appearance and function.)