Elitech Digital Manifold Gauge DMG-4B,HVAC Refrigerant Gauge with Bluetooth APP control

[ADVANCED MODES & ECO-SYSTEM EXPANSION] Standard PT mode is included for immediate use. Advanced modes (Pressure Holding, Vacuum, and Data Recording) require a one-time App purchase. Pair with wireless temperature clamps (sold separately) for real-time SH/SC diagnostics. [RUGGED DESIGN & 200H BATTERY LIFE] Built for the field with a high-visibility LCD, built-in sight glass, and 1/4 SAE ports. Powered by 2 replaceable AAA batteries, it offers an ultra-long runtime of up to 200 hours for extended on-site work. [OTA REMOTE FIRMWARE UPGRADE] Future-proof your tool with Elitech’s OTA technology. Connect via Bluetooth to the App to remotely upgrade your device’s firmware, ensuring you always have the latest features and improved user experience. [140+ REFRIGERANTS & CLOUD UPDATE] Access 18 built-in refrigerants including R410A, R134a, and R22. Use the "Elitech Tools" App to update and synchronize over 140 customized refrigerant types to your device for fast, calculation-free service. [PRECISION PT MEASUREMENT] Get professional-grade accuracy with ±1% FS precision across a -14 to 800 psi range. The built-in Pressure-Temperature (PT) mode provides real-time evaporation and condensation temperature readings for high and low-pressure sides.