Complete Access Control Kit - Includes electric drop bolt lock (Fail Secure mode), power supply controller, exit button, 4 remote transmitters, 1 receiver, and power cord - everything you need for setup. Remote Control Operation - Easily lock and unlock your door from a distance with the included 4 2-button wireless remote controls. Fail Secure Locking System - The electric drop bolt lock remains locked when power is off, ensuring security during power failures; perfect for garage, vault, storeroom, warehouses, etc. Quick Exit Button - Features a durable stainless steel push-to-exit button for instant door release from the inside. Simple Installation & Reliable - Surface-mounted lock and exit button make setup easy and simple. High-quality components ensure reliable daily operation in homes or businesses. Electric Drop Bolt Lock with 4 remote controls Fail Secure Door Access Control Kit with Power Supply and Exit Button Easy DIY Install for Home / Office Security