When the gauge is pressed onto the stem of a wheel, the air pressure in the tire pushes against some type of plunger which in turn actuates the readout section of the gauge assembly.

• 它方便了员工上下班考勤，准确掌握员工出勤情况，并可跟财务软件接口，数据更换速度快，兼容性高，可靠性好，避免了以往纸卡资料统计费时费力及各种人为因素造成的考勤记录失真。