Features:brand new and high qualityThe battery voltage must match the solar panel voltage and power.The operating voltage and power of the LED connected to the output terminal must correspond to the battery voltage.Charging during the day, turning on the lights at night and turning off the lights at dawn.The battery voltage is the output voltage.The circuit controls the output by detecting the change of solar panel power generation voltage without photosensitive elements.Scope of application: solar lawn lamp, landscape lamp, courtyard lamp, corridor lamp, DIY street lamp, color lamp string, etc. Specifications:Material: ABSSize: approx. 31x18mm/1.22x0.71in Note:No retail package.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package includes:1 x Solar Control Switch Circuit Board