-BEFORE FIRST USE: Check the input voltage (quoted in V DC) required by your device. Set this voltage on the power supply with the help of the button 2 on the rotary switch 3 and connect the power supply with the mains after connecting the user. -UNIVERSAL: The universal APS 300 power supply from Ansmann with 7 plug types allows you to charge a wide range of small electronic devices such as notebooks, printers, monitors, camera and more. -THE RIGHT PLUG FOR EVERY DEVICE: with 7 different plugs easily interchangeable to always have the right plug at hand! Ideal for devices up to max 300mA -Details: Plug types: 2.5 jack plug, 3.5 jack plug, 5.5/2 connector. 5, plug connector 5.0/2.1, plug connector 4.0/1.7, plug connector 3.5/1.35, plug connector 2.35/0.75. ErP Compliance Built-in reverse polarity -ADJUSTABLE: The voltage is adjustable with the knob on the back (3-12V). Maximum output current: 600mA at 3V-6V / 450mA at 7.5V / 400mA at 9V / 300mA at 12V. -INTUITIVE USE: putting the universal power supply into operation is simple. Check the current and voltage indications on the device and insert the right plug!