A wireless thermometer probe system compatible with Testo instrumentsWireless measurement up to a distance of 20m between instrument & probeEliminates the hindrance and damage of conventional attached cable & temperature probesRequires one radio module Testo part no. 0554 0188 (Stock no. 512-0480) to be plugged into the Testo instrumentRadio handle Testo part no. 0554 0189 (Stock no. 512-0496) communicates with the radio module and has a type K thermocouple miniature socket to accept Testo or any K type plug mounted probeRadio immersion Probe Testo part no. 0613 1001 (Stock no. 512-0660)communicates with the radio module and has an integral NTC immersion/penetration probe