Input Voltage: 5V DC (via standard USB-A or USB-C).
Output Voltage: 9V DC or 12V DC (often toggleable via a switch).
Max Input Current: Typically 2A to 3A.
Max Output Current: Up to 1A at 9V / 0.8A at 12V (varies by source power).
Efficiency: 85% to 95% (some energy is lost as heat during conversion).
Connector Type: 5.5mm x 2.1mm barrel jack (the most common standard size).
Cable Length: Usually 1 metre to 1.5 metres.