*press switch button when reading data, no need touch and never be worn *light and libration when reading successfully *more simple design, more applied *card type: emid card (read only) *low battery alarm function, data full alarm function *metal luxury case, water-resistant and shake-resistant, resist low temperature *use rs232/usb cable to download data, do not need communication stations *low tiny-power consumption, very low static state electric current *influence distance: 3 to 6cm Dimension: 140í-º¦27mm Weight: 104g