Module-level MPPT,5-25% more power generation 25-year use life,same as PV module For PV power plants in operation and under construction Easy to install Plug and Play Note:Due to different factory batches, if the appearance of the sticker words is different, it does not affect the use of the product. Colour:Black Material:Plastic+Metal Package Contents: 1 * Solar Optimizer Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.