High quality. Universal power supply source unit. Max 60W Load CE & RoHS certification. 2 years factory warranty and long working lifespan. Automatic Protections: short circuit, over load, over voltage, over temperature and inrush current. PARAMETER Type: Constant voltage single output Input Voltage: 100-240V AC (264V AC peak) Input Frequency: 50/60Hz Output Voltage: 12V DC Output Current: 0-4A (5A peak) Output Power: 0-48W (60W peak) Output Frequency: 65k Hz FEATURE Shell Material: Metal Colour: Silver Protect Level: IP 20 (Indoor use, non-waterproof) Waterproof: No Working Environment: -20~+60 Celsius, 20%~90% RH Fan: No Cooling Method: Free air convection Variable Resistor(+V ADJ): Yes Usage: LED;s, security, etc.