The Stoneuk ST-B3E is a double-pole, double-throw emergency push button switch designed for access control and fire safety systems. Made from fireproof materials with a sandblast finish, it ensures durability and reliability in critical situations. Operating at DC12V and supporting up to 36V DC / 3A, it features NO/NC/COM output contacts and is available in multiple color options. Ideal for emergency door release applications in gates, exits, and automation control systems.