Input Voltage	170-250 Volts AC, 50/60Hz
Output	12Volts/2.5A
Function	Waterproof Switching mode power supply for Led lighting
Applications Dimensions	Led Strip Lighting, single or colour changing (RGB) 20 X 3 X 2 (CM)

This Led power supply can drive RGB LED Strips of up to 4 meters maximum (in combination with an RGB Controller).

If you need to control more than 4 meters but less than 5, you may consider buying a 12V/4.16A power supply; or a 5A for up to 10 meters of RGB led strip.