Climate probe (m/s, °C), Impeller probe (0.1-15 m/s), 1 unit(s)Climate probe (m s, C), Impeller probe (0. 1 15 m s), Incl. Bluetooth handle Handle with Bluetooth for cordless connection of probe heads to the testo 440 measuring device. With practical button on the handle for saving individual measured values. For determining flow velocity, volume flow and temperature at air outlets, poppet valves, ventilation grilles or swirl diffusers. Chronological and point by point calculation of average, average volume flow,