The testo 557 4-valve with 3/8 vacuum port digital manifold comes with a remote vacuum probe for faster and more reliable evacuations, Bluetooth App, two clamp temperature probes for instantaneous superheat / sub-cooling readings, and convenient service case.

Key Features:

• External vacuum probe for faster and more reliable evacuation of the system
• Bluetooth / App integration for monitoring, report generation, and sending reports and invoices via email
• Accurate, simultaneous superheat / sub-cooling measurements
• Rugged housing with 5 year warranty with registration for reliable testing
• Measures high side / low side pressures and temperatures
• 4-way valve block with 1/4 in. and 3/8 in. ports
• External vacuum probe
• App integration via Bluetooth (65 feet range)
• Calculates and displays Superheat and Sub-cooling temperatures

What's included:

testo 557 kit, digital manifold with Bluetooth / App; including 2 x NTC temperature clamp probes, external vacuum probe, batteries, case, certificate of conformity, and user's manual.