Testo 557s Smart Vacuum Kit with Hoses – For completely wireless measurements on refrigeration and air conditioning systems and heat pumps. Thanks to the Bluetooth vacuum probe included, you can even measure vacuum without any cables or hoses. You will get the testo 557s smart digital manifold with Bluetooth and 4-way valve block, one testo 552i wireless vacuum probe (Bluetooth), two testo 115i wireless clamp thermometers (Bluetooth, NTC), a hose filling set with 4 hoses and a robust transport case.