Testo Hygrometer Probe Head for Use with testo 635 / 5120474

for the following countries DE, NL, ES, IT, SE, AT, DK, FI, HU, CZ, PL, GR, FR, GB, BE. testo Radio Probe. For testo measuring instruments with radio option Wireless measurement at distances of up to 20 m Flexible thanks to plug-in probe heads