... 304# stainless steel 2,24 volt operating system 3,Door access control 4,OEM,ODM are welcome 5,ISO factory Stainless ... hall doors, residential, etc. Product features1 , Self-test and alarm system function, user-friendly maintenance and use, through the master ... the regulatory requirements5, Using infrared sensors, with illegal entry alarm, followed by the police, the normal people by preventing ...