testo 550 I Digital Manifold Kit for air conditioning, refrigeration systems and heat pumps - with Bluetooth support: Amazon.com: Industrial & Scientific
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Testo 557s Kit I App Operated Digital Manifold, 2 x 115i Pipe Clamp Thermometer, 1 x 552i Micron Gauge I for HVAC Systems – with Bluetooth: Amazon.com: Industrial & Scientific
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