Alpha LI404B Stand-Alone Strobe Unit and Delay

Provide unmistakable visual alerts where audio tones alone aren’t enough. The Alpha Communications LI404B stand-alone strobe call light delivers high-intensity visual signaling designed to complement apartment intercoms, access control points, and security monitoring systems. When an incoming call tone is detected the LI404B flashes once per second for approximately 10 seconds, giving caretakers and hearing-impaired users a clear, reliable notification.

Built for integrators, the LI404B works seamlessly with Alpha Communications amplifiers including PK543, PK292A, PK205 and PK104B, and supports PK502B multi-entrance switching adaptors for multi-unit installations. The compact ABS housing (approx. 4.6" W x 5.6" H x 2.3" D) mounts to standard single or double gang boxes for fast, code-compliant installation indoors. Ideal for assisted living facilities, residential intercoms, and security/surveillance monitoring points, it delivers a durable, maintenance‑free visual solution.

Add the LI404B to your call light or monitoring setup to improve response times and accessibility. Contact your Alpha Communications supplier to specify this strobe for your next security or intercom project.

• Ensures reliable visual notification for hearing-impaired residents or staff, reducing missed calls and improving response times
• High-intensity strobe flashes once per second for approximately 10 seconds to attract immediate attention in busy environments
• Simple compatibility with Alpha Communications PK-series amplifiers (PK543, PK292A, PK205, PK104B) and PK502B switching adaptors for quick integration
• Compact ABS enclosure mounts to standard single or double gang electrical boxes for easy, low-cost installation in apartments, assisted living, or security areas
• Designed for indoor monitoring and security applications where a discrete, durable visual alert is required