Features: Voltage adjustment switch allows selection between 9V or 12V output LED display indicates the output voltage value In case of power outage, connect a power bank to the router using the boost cable to provide power Compatible with various devices such as small fans, desk lamps, solar panels, USB power banks, and adapters Precision craftsmanship, reliable performance, plug-and-play design for easy use Two DC interface options (3.5mm and 5.5mm) for broader compatibility Tips: Do NOT connect the 9V/12V boost cable's USB end to a computer's USB port Maximum output current is within 1A; not suitable for routers or devices requiring over 1A current Product Interface: USB to DC 3.5mm / USB to DC 5.5mm DC 3.5mm specification: outer diameter 3.5mm, inner diameter 1.35mm DC 5.5mm specification: outer diameter 5.5mm, inner diameter 2.1mm Plug polarity: center positive, outer negative Interface type: USB to DC round plug Input voltage: 5V Output voltage: 9V / 12V Maximum output current: 9V at 1A, 12V at 0.8A Cable length: 0.8 meters Package Includes: USB boost cable x1 3.5x1.35 adapter x1