Features 【Self Protection】It also low voltage locking, battery end overvoltage protection and charging status indication function. 【Easy to Use.】This product has small package shape, less peripheral components and it is easy to use. 【12V】With trickle, constant current, over charging and floating charging mode, it is ideal for charging for 12V lead-acid batteries. 【Traceable Function】When powered by solar panels, the internal circuit can automatically track the maximum power point of the solar panel. 【Good Service】If you have any questions about the product, please feel free to contact us. We will reply you within 24 hours and solve your problem until you are satisfied.   Specification: Condition: 100% Brand New Over-charging Voltage: 14.8v Floating Charge Voltage: 13.55V Charging Current: 3A Working Environment Temperature: -40℃-85℃ Weight: Approx. 12g / 0.4oz Size: Approx. 31 * 49mm / 1.2 * 1.9oz   Package List: 1 * Solar Panel Controller Charging Module Package List