Product DescriptionThe Seco-Larm SH 816S SQ/R Siren Strobe delivers a powerful 120 dB warble tone and a bright red xenon strobe light in a weather-proof housing rated to IP65. It operates from 9 to 15 V DC, includes a 25 W speaker capable of message broadcast input, and features tamper output for added security. The unit is designed for both indoor and outdoor use, mounts directly to a wall or standard back-box, and includes wiring options for separate siren and strobe triggering for flexible alarm signaling.