Feature: 1. 12‑24V Power Supply System: Suitable for a variety of power inputs, convenient for users to use in different scenarios, strong compatibility. 2. Waterproof and Anti Fog: With waterproof and anti fog technology, ensure high stability and durability in high humidity and humid environment, and extend using life. 3. Multiple Alarm: With low water, high sewage level alarm, and low voltage alarm, timely reminds users to deal with problems and ensures the safety of equipment. 4. Colorful Backlight: Designed with a colorful backlight, making it easy to observe at night or in a dim environment, improving using experience. 5. Durable Material: Made of 316 stainless steel and ABS, with high corrosion resistance, suitable for sewage, fresh water and other environments, effectively prevent from damage. Specification: Item Type: 3 Gauge Set Instrument PanelMaterial: 316 stainless steel + ABS .Hole Size: Approx. 250x145mm/9.84x5.71in Working Voltage: 12-24VDC Operating Current: ≤70mA (24V) Working Temperature: -30~+75°C Storage Temperature: -40~+85°C Water Level Sewage Meter Signal: 0~190 Ω (factory default) 0~180 Ω 10~180 Ω 240-33Ω 240-30Ω Connection: 1. Red Line: 9-32VDC 2. Panel Black Line: Negative pole of power supply 3. Meter Black Line: Sensor Function: 1. Press the Mode button (less than 1 second) - times to change the backlight color: backlight order red (default) → green→ blue→ white→ yellow→ yellow-green→ orange→purple. 2. The alarm light is set by default water level meter alarm position≤ 1/8; Sewage meter alarm position≥ 7/8. Switch Function: 8 switches control 8 different devices, 8 overload protectors protect 8 switches and 8 devices respectively. Features: 12-24V system, waterproof and anti fog, colorful backlight, low water level alarm, high sewage alarm, low voltage alarm Package List: 1 x 3 Gauge Set Instrument Panel1 x Manual1 x Pack of Accessory (5 Pcs)