1.Unidirectional or Bi-directional pass are available . 2.Anti-crash, turnstile arm holds tightly without receiving valid open signal. 3.Anti-follow, turnstile arm rotates 120degree for each passing and then locks automatically. 4.Auto-reset function. A.Turnstile arms rotate 120degree for each passing and then lock automatically. B.If the passenger does not pass in given time, arms will lock automatically.(given time can be set by operator). 5. Arms drop automatically when power off to meet the fire safety management requirements. 6.Can be linked with multi card-read devices. Turnstiles work on basis of receiving reply switch signal. 7.Normal open or normal close, arms drop can be controlled via external button. 8.Unidirectional or bidirectional access control can be realized by the external button . 9.Convenient operation and maintenance(with functions of failure self-checking and alarm). Optional Functions: Long-distance control and management Passenger counting