The kit for wireless measurements in the field of commissioning, servicing, and maintenance of refrigeration and air conditioning systems and heat pumps: You will get the Testo 550s smart digital manifold with Bluetooth and 2-way valve block, two Testo 115i wireless clamp thermometers (Bluetooth, NTC), a set with 3 filling hoses, and a robust transport case. Additional Bluetooth probes, e.g., for wireless, hose-free vacuum measurements with the Testo 552i, are available separately.