2021 versionFeatures: WIFI operation, Digital LCD screen display and controller. SINE wave technology, ultra quiet, high stable performance. Cross flow double impeller structure, water flow no dead end. No exposed cooper element, suitable for both marine and fresh water. IC electronic detection, dry/locked rotor protection, automation power-off protection upon no water. Master and slave wireless control. Models/Specifications: MCP-180Voltage: DC 24VWatts: 65WDimension: 340 x 82 x 52mmTank Size: 180cmTank thickness: ≤19mm MCP-150Voltage: DC 24VWatts: 55WDimension: 330 x 74 x 48mmTank Size: 150cmTank thickness: ≤19mm MCP-120Voltage: DC 24VWatts: 40WSpecification Size: 295 x 72 x 45mmTank Size: 120cmTank thickness: ≤15mm MCP-90Voltage: DC 24VWatts: 25WDimension: 283 x 66 x 40mmTank Size: 90cmTank thickness: ≤8mm