Card Decoder Read mode: EM card number Read support (8H10D conversion rule: take last eight hexadecimal digits and convert it to maximum 10 decimal digits). Reading Distance: Up to 100mm. Operating frequency: 125KHz. Read time: Less than 100ms. Transmission Interface: USB. Power supply: USB rechargeable. Operation Temperature: 0℃ ~ 65℃. Operation Humidity: 0-95%. Color: black. Weight: 120g.