Features: DC12V NE555 automatic water levels controls relays module ensures precise liquid management with 2probe sensing technology for pumps activation/deactivation. Features probe detection systems, simplified wiring diagrams integration, and stable 12V operations for consistent performances in diverse environments. for electronics enthusiasts, industrial maintenance technicians, and agricultural systems operators requiring automated water levels solution. Perfect for residential water tanks, factory cooling systems, and mining equipment where automatic water levels controls prevents overflows/dry run damage. This water levels controls module supports customized installations through adjustable probe positioning, for pumps and for projects. Specifications: Working voltages: 5-12V current: 10A Size: 44x29mm Package Includes: 1PC Water levels Controller Module note: Please allow 0-1cm error due to manual measurement. make sure you not mind before bid. Due to the differences between different monitors, the Pictures may not reflect the actual of the item.