Durable DesignRobust casing protects against scratches,bumps, drops, withstands pressure and keeps internal components safe during emergencies enhanced longevity. | Broad CompatibilityMax 3A ouput means it can supply with amperage less than 3A. ---such as 1A, 2A, 3A. If your device draws 2A, 2A will be supplied. But if draws more than 3A, only 3A will be supplied. | Expanded ApplicationWe especially add a female terminal connector in the package. You can screw wires onto it to power the devices that have no female DC socket. This will greatly expand its applied range. | Professional AdviceThe max use should be no more than 80% of the full loads. Otherwise, power supply's service life will be shortened. We recommend to use 15W PS to power devices less than 12W. |