[Negative Polarity] – SoulBay Universal Charger AC/DC Adapter Switching Power Supply with Six Adaptor Plugs for Household Electronics Routers Speakers SmartPhoneThis is a universal power supply for all your pedals, effects, wireless receivers and more. Features include worldwide input, regulated output in multiple voltages, six adapter plugs and more. This adaptor is designed to supply power where and when you need it. With selectable DC output up to 12 volts and plugs to fit most small electronic devices, it replaces a box full of batteries. Attention: NOT compatible with laptop or other high power equipment. Polarity is irreversible. Always been imitated, never been surpassed. This Universal Ac adapter has 6 selectable adapter tips, which meet your various demand on home electronics! This power supply gives a universal regulated switching mode supply with selectable AC Input 100 to 240V AC (so with an electrical plug adapter it will work anywhere in the world). The Negative Polarity 30W Charger has selectable DC Outputs: 3/4.5/5/6/7.5/9/12V. The charger also includes 6 detachable DC output plugs, so that it will fit almost all DC input sockets. Used for battery chargers, printers, games consoles and many other appliances. There is also a 5.0V 2.1A USB port, so this 30W AC Adapter can also function as an adaptor to turn any USB cable into a charger. Perfect for USB Charging Smartphones and other Devices.Multifunctional/ Universal ac/dc adapter!Attention: PLEASE kindly Have A Check on the Polarity Of Your Devices. This SoulBay 30W Charger is Inner Negative – Negative Polarity, as the picture shows. For a Positive Polarity Charger, please kindly Search B00ZTZQ5OQ.6-in-1 Universal Charger, which largely save your space and this one can replace a lot chargers!6 Connection Tips Spec.2.5*0.7mm, 3.0*1.1mm, 3.5*1.35mm, 4.0*1.7mm, 5.0*2.1mm, 5.5*2.5mm. Note: DC Plug Polarity: inner Negative(-), outer Positive(+).Package Includes:Universal power adapter 30W6 DC Tips1 little keyFor the voltage selector, you adjust it using the provided key.Compatible for:3V to 12V Household Electronics, Scales, Routers, LED Strip Lights, USB Charging Camera, Smart phones/Mobile phone, Tablet PC and other device. Please check carefully for the votage and the connector before purchase. Thank you!