GANGDU,Coin validator, coin selector, coin acceptor, coin mechanism, coin rejector, coin operated. toke validator,token selector, token acceptor, token mechanism, token rejector, token operated. garage door,sliding door, automatic door,Automatic Door Sensor, Contactless Switch, Remote Control, Push Button, Automatic Door Safety Beam, Microwave Sensor,Password access control,infrad sensor, door clamper, electric bolt,multifunction expansion board