SD-3001 BL is an outdoor siren with optical-acoustic signaling, provided with ultra-bright LEDs and a dynamic horn. Four selectable, modulated tones are available for acoustic signaling, with a sound pressure level of 120 dB. The siren can be operated with 1.3 Ah, 12 V battery, which is installed inside the enclosure and serves as a backup power source. The impregnated electronic circuits are weatherproof. The device is provided with tamper protection which responds to opening the enclosure and tearing if off the wall.

The enclosure is made of durable polycarbonate to ensure high impact-resistance and aesthetic appearance of the device that remains unchanged for many years.