testo 440 dP air velocity and IAQ measuring instrument including differential pressure sensor, connection hose, 3 x AA batteries, USB cable and certificate of conformity, Vane probe 4 inch with Bluetooth including temperature sensor consisting of 4 inch vane probe head, handle adapter and Bluetooth handle; bracket for testovent measurement funnel; 4 x AA batteries, 16 mm vane probe head including temperature sensor, Humidity/temperature probe head 12 mm, Extendable telescope up to 3 ft. in length for flow probes with a universal handle including 90Deg angle and a multi-case for testo 440 and multiple probes.