Low pressure alarm Alerts when pressure falls below the preset threshold, enabling immediate action to prevent equipment damage or process interruption. Backlight setting Adjustable backlight improves readability in lowlight conditions and helps conserve power when light is not needed. Voltage display Realtime voltage readout provides quick status checks of the connected system and supports basic diagnostics. Power off save When power is removed, the device stores the last readings and settings, allowing a smooth resume when power returns. Use scenarios Industrial maintenance: used on plant pressure lines to trigger alerts via the low pressure alarm and verify supply status with the voltage display during operation. Field service: suitable for onsite checks of portable systems, with backlight for readability in outdoor or dim environments and quick power checks via the voltage display. Workshop or lab work: ideal for scenarios requiring data retention; power off save preserves the last measurements between experiments or tests.