Simple and portable parking meter

摘要: A portable parking meter including a main device and at least sub-device; The body of the has two inserting slots for some sub-devices is provided on front face thereof with control panel, are card interfaces capable communicational connection when insert therein; CPU which uses reset loop connected peripherally keyboard interface, an oscillating LCD loop, its internal timing program to establish communication between it sub-devices, can count sequentially by rate value preset in or reckonning times deducting amount charges as fee.