The KLAXON ESF-5003 is an electro-mechanical signaling unit designed for use in industrial, heavy commercial, and high security applications. It is a dual tone siren with a high/low pitch selection and a maximum output of 120 dB (@ 1 m). This siren can be used as an outdoor warning siren, as a fire alarm, or as an industrial signaling device. It features an adjustable timeout setting, easy mounting, and a rugged design for reliable and long-term use. The KLAXON ESF-5003 is an ideal choice for applications requiring reliable, effective, and long-lasting signaling.