1. The meter can be used as a universal analog input display meter. It can be paired with various sensors that have analog output to display the actual physical quantity, such as temperature, frequency, motor speed, pressure, liquid level, and concentration. 2. The instrument supports current input or voltage input. 3. Default input ranges: 0-10V, 2-10V, 0-20mA, 4-20mA. By adjusting the bias and gain parameters, it can be configured for other inputs within the 0-10V or 0-20mA range. 4. The default display mode is percentage. Users can set a custom display range using parameters F0-2 to F0-4. 5. Models with 485 interface support communication between meters, enabling easy multi-point monitoring. Model variants: HXDSBOXAH-NR: Standard version HXDSBOXA-485: With RS485 interface HXDSBOXAI-RL: With relay output Power supply specifications: Standard version and RS485 version: DC 6–25V, power consumption 24V/40mA Relay output version: DC 8–25V, power consumption 24V/50mA Equipped with reverse polarity protection and surge protection Color: Gray Material: Plastic Size: 79 x 43 x 25mm Package Contents: 1 x Digital display meter Only the above items are included; other accessories are not included. Note: Lighting conditions and display settings may cause slight variations in the color shown in images compared to the actual product. Measurement error tolerance: +/- 1–3cm.