Features:Full 3-stage PWM charge management. Short circuit protection, open circuit protection,over-charging protection, over-discharging protection. Reverse polarity protection for battery, solar panel and auto temperature compensation function. Automatically manage the working of solar panel and battery in solar system. Suitable for small solar energy system. Specification:Condition: 100% Brand NewCharge Mode: PWM Mode Material: PlasticMain Color: Black Optional Model:3S12.8V3A, 3S6V/12V3A Working Temperature: -30~55Waterproof Grade: IP40Size:approx.5.2*6.8*2.3cm/2.05*2.68*0.91inWeight:approx.38g/1.34ozPackage List:1 * Solar Charge ControllerNote: 1. Connects the battery first and then the solar panels, finally connects the load, don't reverse the positive and negative poles.