Data storage: Refer to the product section of the sound level meter for details in the English manual. The instrument automatically stores data every 2 seconds, recording the highest noise value during each interval, with storage capacity sufficient for one year of continuous operation. Large Screen: Features a super large 9.6-inch LCD digital display with backlight for clear and visible readings in low-light environments. Alarm function: Allows easy setting of an alarm threshold. When the threshold is exceeded, the measurement is saved and the value flashes for an adjustable duration between 6 and 120 seconds, accompanied by an ble alert. If the measured value exceeds the alarm level, a beep sounds and the data is locked with flashing display for 2 minutes. USB powered: Connect to a computer via USB cable to enable data transfer, sample collection, and printing of data including maps and dates. Wall Mount Type: Equipped with a hanging hole for wall mounting or can be placed freely on a tabletop. Suitable for use in homes, factories, offices, hotels, hospitals, laboratories, theaters, and o systems.