Unlock options: Enjoy various unlock options such as button, remote control, smart sensor, etc. Convenient to use with a building intercom. [UNLOCK OPTIONS] Enjoy various unlock options such as button, remote control, smart sensor, etc. Convenient to use with a building intercom. Delay function : This lock allows the door to be opened inward, outward and 180 degrees, with an optional delay of 0/5/10/15 seconds.Robust design: Made of high quality materials, this electromagnetic lock offers strong thermal performance and magnetic field. It is heat resistant and has an aluminum alloy casing for thermal.Quiet operation: This electromagnetic lock is designed for ultra-quiet operation, without disturbing noise. It also provides low energy consumption. Safety and reliability: This lock has a red LED light for locking and a green light for unlocking. It is equipped with a signal feedback function and ensures a stable suction. Time delay function: This lock allows the door to be opened inward, outward and 180 degrees, with an optional delay of 0/5/10/15 seconds. Robust design: Made of high quality materials, this electromagnetic lock offers strong thermal performance and magnetic field. It is heat resistant and has an aluminum alloy casing for thermal.Quiet operation: This electromagnetic lock is designed for ultra-quiet operation, without disturbing noise. It also provides low energy consumption. Safety and reliability: This lock has a red LED light for locking and a green light for unlocking. It is equipped with a signal feedback function and ensures stable suction.