Feature: 1. 12 to 24V Power System: Suitable for a variety of power inputs, convenient for users to use in different scenarios, with strong compatibility. 2. Backlight Design: Gauge has a 7 color backlight function, making it easy to observe at night or in a dim environment, improving the user's experience. 3. Multi Alarm: Equipped with low water level alarm, high sewage alarm and low voltage alarm function, which reminds the user to deal with the problem in time and protects the safety of the equipment. 4. Anti Rust: Excellent 316 stainless steel and ABS material with high rust resistance, suitable for sewage, fresh water and other environments, effectively preventing panel damage. 5. High Performance: Waterproof and anti fog technology ensures the stability and durability of the panel in high humidity and wet environments, prolonging life. Specification: Item Type: Boat Gauge SetMaterial: 316 stainless steel, ABSOpening Hole Size: Approx. 250mmx145mm/9.84x5.7in Working Voltage: 12-24VDC Working Current: ≤70mA(24V) Operating Temperature: -30-+75°C Storage Temperature: -40-+85*C Water Level Gauge Signal 5 Groups: 0-190 Ω (factory default) 0-180 Ω 10-180 Ω 240-33 Ω 240-30Ω Gauge Function description: 1. Press the mode button lightly (less than 1 second) to change the backlight color: backlight sequence red (default) → green → blue → white → yellow → yellow green → orange → purple. 2. If you buy a liquid level meter, the meter parameters can be adjusted according to the following instructions: (oil level gauge, water level gauge, sewage gauge) Press and hold the Mode button for 3 seconds to enter the setting mode, the backlight flashes, the pointer stays at the E position, then touch the button again and the pointer will point to different positions, the pointer is in different positions, the pointer is in different positions. The pointer will point to different positions, the pointer in different positions represents different sensor parameters as described in the table on the right. 3. If the instrument with alarm lamp default settings: oil level meter, water level meter alarm position ≤ 1/8; sewage meter alarm position ≥ 7/8. Panel Switch Function Description: 8 switches respectively control 8 different devices, 8 overload protectors respectively protect 8 switches, and protect those 8 devices at the same time. Protect the 8 devices at the same time. Features: 12-24V system, waterproof and anti fog, 316 stainless steel, 7 color backlight, water level with low level alarm, sewage with high level alarm, with low voltage alarm. Package List: 1 x Instrument Panel1 x Package of Accessories(5PCS)1 x User Manual