Testo-0560-5522-552-Digital-Vacuum-Gauge-with-Bluetooth-Testo-0560-5522-P-The-Testo-552-is-a-digital-vacuum-measuring-instrument-ideal-for-use-during-the-evacuation-of-refrigeration-systems-and-heat-pumps-It-measures-even-the-smallest-absolute-pressures-and-provides-highly-precise-information-on-the-status-of-the-dehumidification-of-a-system-Its-robust-construction-makes-it-suitable-for-daily-use-and-protects-it-from-dirt-and-water-P-P-This-version-of-the-Testo-552-connects-via-Blueto