Bluetooth one machine (offline free wiring) 1 reader speed, distance. 2, either completely offline use, and can be networked to use. Support computer management issuer list, check credit card records, including issuing a list of 6000 Article 3 10,000 credit card records, offline operation, traffic record the entrances can be imported one machine management software to query statistics by U disk. 4, brought back to sneak function effectively prevent a duplicate card entry and exit. 5, valid written directly to the card, convenient authorization. 6, support for blacklist management, effectively restrict unauthorized users. 7, supports voice and LED display, applications more intuitive. 8, good card stability, anti-jamming, anti-weak capacity, interference from other communications products. Remote parking management system using infrared and radio frequency dual channel mode of communication, the reader antenna transmits infrared signals to scan, when the electronic tag is scanned into the scan area signal activation, electronic tags activated transmit a radio signal to the scan antenna, complete communication tasks. When the electronic tag from the scanning area automatically revert to sleep.