320WNote: brand new unused because of small scratches on hand-made appearanceCompatible with all of photovoltaic panelsMPPT optimizer for solar panelsPhotovoltaic panels stabilize voltage and improve productivityMaterial: Plastic+MetalColor as shownPurchase Instructions:The product has been unlockedAfter unlocking the plate open circuit voltage input how much V output is how much V, voltage stabilizing effectFunction is: stable pressure increase capacity 5%-25%Stable voltage = open circuit voltage is stableIncrease capacity = increase Package Contents:1 x Solar MPPT DC Photovoltaic optimizer(320W)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.