LED Display, Built-in Sound Prompts, Intelligent Flushing, Water Control, Automatic Fault Detection, Short-Term Protection. Flushing: 18 seconds before each water production cycle; 8 seconds every 2 hours during water production (pump running, inlet valve open, flush valve open, flush indicator flashing). Water Production: Activated when no water shortage is detected and the system senses an incomplete water fill signal (pump running, inlet valve open, flush valve closed, water production indicator flashing). Water Full: Triggered upon detection of a full-water signal (pump stops, inlet valve closes, flush valve closes, full-water indicator remains lit). Water Shortage: Detected during flushing or water production (pump stops, inlet valve closes, flush valve closes, low-water indicator blinking). Maintenance Mode: Activated after continuous water production exceeds 6 hours (flush valve closes; system requires power cycle to reset) (pump running, inlet valve open, flush valve closed, all indicators flashing). Compatible With: RO systems rated 400 GPD and below. Operating Voltage: DC 24V Inlet Water Pressure: Standard municipal tap pressure Power Consumption: < 0.6W Operating Temperature: -20°C to +70°C Operating Humidity: 5%–85% Display Size: Approx. 71 × 30.2 mm Mainboard Size: Approx. 130 × 61 mm Color: Blue Material: PCB Note: Designed for use with water purifier storage pumps, including models compatible with Water-128 (400 GPD) control panels. Package Includes: 1 × Water Purifier Control Board (with English label) 1 × 50 cm flexible cable