... 20 MHz On-chip Oscillator and one PLL -Supports 3.20, 3.43, 3.69, 4.00, 4.36, 4.80, 5.34 ... ?Models with USB connection. - Can be cascaded with more SmartReadersPlus using an USB Hub. - No power supply required. - Supports all known smartcards. USB card reader Smargo Card Reader for receiver