The DR30B5-EB is a 30mm-diameter electronic sound buzzer designed for industrial control applications. It features an LED operation indicator (red), intermittent/continuous sound selection, and operates at 12 to 24V AC/DC without a transformer. The buzzer produces a sound level of 90dB at 0.1m and 70dB at 1m, with a frequency range of 2.4 to 3.3kHz and an intermittent cycle of approximately 170 cycles/min. It has a rated insulation voltage of 60V AC/DC without transformer, dielectric strength of 1000V AC for 1 minute, and operates reliably across an ambient temperature range of -20 to +60°C with 1000 hours of durability. The DR30B5-EB is ideal for alarm systems, machinery control panels, and warning applications where audible alerts are required in industrial environments.