Specification :

Measure air velocity in a pocket-size meter
Designed as an entry-level meter
Air flow can be displayed in five units— ft/ min, m/ s, km/ h, mph, or knots. Low-friction ball vane provides a greater degree of accuracy. Meter features data hold, min/ max button with recall, auto power-off— all in a lightweight, easy-to-hold design.
Specifications
Accuracy ± 3%
Resolution 1 ft/ min ( 0.1m/ sec)
Range 80 to 5910 ft/ m ( 0.4 to 30 m/ s)
Dimensions 2-1/ 4" W x 6" H x 1-1/ 4" D
( 6.4 x 15.2 x 3.2 cm)
Model DAF800
Power 9-volt
Manufacturer number DAF800