1 Magnetic card reader with keyboard. 2.Security and convenient 3 Work voltage range huge (3V~5V). Magnetic card keyboard Reader 752u752uSingle magnetic card Reader is a new type magcard reader which integrated codePower supply : DC 50V±5% Working temperature :0 - 45°CHumidity :20—90%RH Dimensions (L*W´*H) 150mm ×102mm×43mmWeight:250gReliability :Reliable for over 1,000,0000 card swipes :