Card Decoder Read mode: EM / Mifare card number read support (8H10D/4H10D conversion rule: take last eight/ four hexadecimal digits and convert it to maximum 10 decimal digits). Reading Distance: Up to 100mm. Operating dual frequency: 125KHz, 13,56 MHz. Read time: Less than 100ms. Transmission Interface: USB. Power supply: USB rechargeable. Operation Temperature: 0℃ ~ 65℃. Operation Humidity: 0-95%. Color: black. Weight: 120g.