LED Desk Lamp ,Pashion Reading Lamp Touch Dimmer USB Reading Lamp Emergency Lighting with Flexible Goose-neck(Green) Inserting the adaptor or plug to the power,and connect with DC 5V power(like computer,power bank,adapter,and other output with DC 5V) Using your finger to shortly touch the switch of control panel in the base of lamp,the lamp light,this is the highest brightness station Then long touch the switch of control panel,the lamp goes dim from bright,retouching it in long time after loosen finger,the lamp will become brighter and brighter Short touch on the switch of control panel will turn off the lamp when the lamp is lighting,shortly touch is on/off switch function The brightness of lamp can be adjusted,when choose the best brightness you like just loosen finger,the tube can be bended to any anger as you see