... Card lock,RF card,RF Encoder,RF software,and the Energy saving switch,PDA. Motel RF card lock system,Software installed on ... all kinds of cards,use the cards to open the door and get power in the room,PDA to collect the open door cards. Motel ... ,open door card,Encoder,software,PDA,and the Energy saving switch. Working theorySoftware installed on the computer,then use the Encoder to make all ...