The HUB4 allows you to wirelessly monitor vapor and liquid pressures via the WPP1 probes and vapor and liquid temperatures via the WPC2 wireless pipe clamps, all of which is accessible from one convenient location using the free UEi HUB App. This easy-to-use App and robustly designed set of probes make an excellent addition to any technician's toolbox. The HUB4 is backed by a 1-Year limited warranty.