Specifications:Universal AC input / full rangeIt's good quality & high performanceInput:AC110-220V 50/60HzOut put:DC 12V 30AWeight:900GSize:L214 x W113 x D50 mm)100% full load burn-in testProtections: overload/ over voltage/ short circuitCooling by free air convection(Not suggest for use in bathroom)Package include:1 x 12V Switching Power SupplyConnection:L、 N: AC power inputGND: DC power output "-"V: DC power output "+"+V / ADJ: Adjust the output voltageSafety Compliance: CCC/ FCC / CEWorking Temperature: 0~40??Storage Temperature: -20~60??Ambient Humidity: 0~95% Non-Condensation This Power Supply Unit "DOES NOT" come with installation instruction、 wiring cable、 on/off switch、 or screws. Professional installation of qualified electrician is highly recommended.