Description: Material: Fully sealed waterproof glue, high power sealed MOS tube, aluminum alloy shell for heat dissipation. Durable and wear resistant. High Performance: Advanced manufacturing technology, high reliability, and high performance. Easy Installation: Easy to use, stable performance, easy to install. Function: Solve the problem that the solar energy is partially blocked by shadows and improve the solar energy conversion efficiency. Note: The default is only used for solar energy with an open circuit voltage of 1V. When choosing an optimizer, optimizer power should be greater than or equal to the solar power itself. Specification: Model: P3205NC4ARS Output power: 320W 5-60V 15A Input voltage: 8-48V 11A Open Current: 1V Model: P7005NC4MRX Output power: 700W 0-85V 15A Input voltage: 12.5-125V 10.1A Open Current: 1V Size: 15cmx32cmx5cm/5.91inchx12.60inchx50inch Package Includes: 1 Piece Solar Photovoltaic Optimizer Note: Please allow slightly errors due to manual measurement and different monitors.