Features:Universal AC input / full rangeIt's good quality high performanceInput: AC 85-265V 50 / 60HzOut put: DC 5V 12V 24V100% full load burn-in testProtections overload / over voltage / short circuitCooling by free air convection / fan coolingThis Power Supply Unit "DOES NOT" come with installation instruction, wiring cable.on / off switch, or screws, Professional installation of qualified electrician is highly recommended.How to calculate Support max LED Strip Length:Assumption Your LED Strip 60LEDs / m, and each LED 0.2W, then calculate max LED Strip Length 0.2W / LED X 60LEDs / m=12W / m, 60W (this listing) ÷ 12W / m=5m, So, Support the LED Strip (60LEDs / m, 0.2W / LED) Length (Max)=5MNot suggest for use in bathroom