USB booster input voltage is DC 5V, output voltage is DC 9V or 12V, max output current is 1A (9V), 0.8A (12V).APPLICATION: the converter can be used to power the router via power bank if power down. In addition, can also be applied to other device which is 5v power supply, such as small fan, desk lamp, solar panel, USB power pack, power adapter etc.SWITCH & LED DISPLAY: step up regulator is designed with switch, you can choose the output 9v or 12v through it, and the LED display would tell the output voltage value.CONVENIENT USE: plug and play, you can still enjoy the WIFI during power cuts; design with small dimension, is very convenient to carry out.Colour: Blackmaterial: plasticInput Voltage: 5VOutput Voltage: 9V / 12VOutput Current: 9V 1A 12V 0.8AInterface Properties: USB hole convert to DC round holeLine Length: 0.8 mWeight: 35 gPackage Contents1* 5V Step Up to 9V 12V dc Voltage Converter1* 3.5*1.35mm DC connector1* One to two adapteOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.About UsWe provide the good product with the best price,we support Wholesale/Drop Shipping Order1. For Drop Shipping order, please remark"dropshipping order", we will prioritize it.2. For Wholesale/Drop Shipping orders, if you have any ideas about the price or package,please contact us in advance,we will give you the best service to satisfy your demands.About Shipments1.We will send out the orders ASAP once your payment is completed normally.2.Please write your complete delivery address with correct phone number and zip code, especially please confirm your full name.About After-sale ServiceWe are reliable seller and we have our professional after-sale service for all of our customs. If there is any question about the order,please contact us in advance ,we will always here until you get a happy answer.About Feedback1. Please check the package and item when you get carefully to make sure there is no problem.2. If you have any problem or are not entirely satisfied with your package,please don’t be hesitate to contact us first before leaving negative feedback. We will resolve the problem to satisfy you.3. If there is no problem, please leave us five star positive feedback.Your affirmation is our greatest motivation ! !