1.The system has sole power supply and high stability,availble to large-scale voltage; 2.Memory inside,can discern more than 900 user cards;Has 86 standard electric box and inner card reader; 3.Use RS485 general line connect to the network,needn;t system box,easy to install; 4.Has PC shell,sunshine proof,theft proof,water proof; 5.Can control any type of electronic lock, support double cards reading and rolling telecontrol etc. Currency: USD Unit Price: negotiate Quantity: 10000 Delivery: Base on your demanded quantity.