Great product! Highly recommended. Can be run with cheap and highly available 20V 2A power supplies like Fujitsu-Siemens 20V 2A, ADP-40PH, FV. With that particular power supply, it produces 12.5 V on the output, so most likely the device does not need 24-30V input power supplies to produce the desired 12V outputs. Extra info: with 12V power supplies on the input it produces 4.5V on the output.