【SAFETY PROTECTION】This universal charger adapter is made of premium materials, built-in smart chip to prevent overvoltage, overcurrent, short circuit and overheating, which is safe and reliable. 【ALL-IN-ONE POWER SUPPLY】41W power adapter, the adjustable voltage range is 6V to 24V, which can meet your different needs. Suitable for various DC household appliances: routers, speakers, doorbells, tablets, LED light bars, aquariums, CCTV camera systems, USB charging cameras, DIY connection, etc. 【NOTE】DC plug polarity: inside positive (+), outside negative (-), polarity is not reversible. Please check the output information of your device and compare it with the adapter, as wrong polarity or voltage may damage your device. Note: The data are all manually measured, please allow 1-3cm error. Due to differences in light and display, there may be some color differences, please refer to the actual item received.