• All activities, from measurement through to documentation, using the testo Smart App on your Smartphone
• The smallest digital manifold on the market
• Maximum reliability thanks to the extremely robust housing with IP54 protection class
• Optionally expandable with testo Smart Probes for temperature, humidity and vacuum

The testo 550i app-controlled digital manifold with Bluetooth, 2-way valve block and sturdy hook offers extensive measurement technology in an exceptionally compact format. Use this extremely robust manifold to carry out your everyday work on refrigeration and air conditioning systems and heat pumps wirelessly, with ease and reliability. All using the testo Smart App on your smartphone or tablet.