[HIGH SECURITY] Locks automatically when powered, providing reliable protection for your door. [DURABLE MATERIAL] Made of sturdy aluminium alloy for long-lasting safety and security. [EASY TO USE] Unlock automatically when power fails, ensuring convenience in any situation. [SURGE PROTECTION] Built-in circuit absorbs surges, maintaining stable performance over time. [WARRANTY INCLUDED] Professional electromagnetic lock with a 2-year warranty for peace of mind., Manufacturer: Jelquix