Measurement of air velocity, volume flow and temperature Display of the volume flow of multiple outlets in order to adjust systems Easy parametrization of the outlet (dimension and geometry) Convenient viewing of readings on a smartphone/tablet with the testo Smart App Professional measuring technology in a small format: the compact testo 410i vane anemometer with smartphone operation measures the volume flow, air velocity and temperature at air outlets quickly and reliably. The testo Smart App enables readings to be viewed conveniently and offers intelligent additional functions.