Alpha LI424B Stand-Alone Strobe Unit with Delay

Ensure reliable visual notification where audible alerts fall short. The Alpha Communications LI424B stand-alone strobe unit delivers high-intensity visual signaling designed for security, surveillance and monitoring applications — especially where ADA or hearing-impaired notification is required. The LI424B operates on 24V DC and features a hi-brightness strobe coupled with built-in timer/delay circuitry so each activation provides consistent, attention-grabbing flashes without extra control hardware.

This compact security strobe light (5.5" H x 5.1" W x 2.1" D) mounts easily on walls or surfaces and consumes low power, helping lower operating costs while maintaining effective coverage in busy common areas, elevator lobbies, or entry vestibules. Installers benefit from flexible triggering via a dry-contact pushbutton or relay, and integrators will appreciate native compatibility with Alpha Communications IA543 amplifiers and IA502 transfer relays for apartment intercom and access-control systems.

Specify the LI424B when you need a dependable visual alarm for security systems, surveillance suites, or ADA compliance. Contact your distributor to order or to discuss deployment in your next monitoring or intercom project.

• Provides high-intensity visual alerts to improve occupant safety and ADA accessibility, ideal for hearing‑impaired notification
• Stand-alone operation with dry-contact trigger and 24V DC input for flexible integration into existing security, intercom and monitoring systems
• Built-in timer/delay eliminates the need for external controllers, delivering consistent timed notifications and simplifying installation
• Low-power, hi-brightness strobe reduces energy costs while ensuring clear visual signaling in high-noise or surveillance environments
• Compact 5.5" x 5.1" x 2.1" form factor for easy wall or surface mounting in apartments, commercial buildings, and secure facilities
• Compatible with Alpha Communications IA543 amplifiers and IA502 relay modules for seamless intercom and access-control integration