Features Simultaneous display of Ambient Temperature and Air Flow or Air Velocity Up to 8 easy to set Area Dimensions are stored in the meter's internal memory 20 point average function for Air Flow Super large LCD Backlit Display 3% velocity accuracy via low friction 2.83" D (72mm) ball bearing vane wheel on 3.9 ft. (120cm) cable Data hold and MIN/MAX Auto Power off Completer with vane sensor with 3.9 ft. (120cm) cable,9V battery,protective rubber holster,and carrying case