1. Material: plastic 2. Voltage: 12/24/220/380V 3. Working mode: whistle + flashing light 4. Degree of protection: IP45 5. Volume: 120dB 6. High decibel transmission, clear and bright sound 7. Waterproof and dustproof design, can be used outdoors in rainy days 8. LED stroboscopic light, using high-brightness LED lamp beads, low energy consumption, durable 9. Installation size: about 22mm 10. Alarm principle: power-on alarm, sound and light alarm 11. Applicable scenarios: workbenches, assembly lines, electrical equipment, power distribution boxes and other places can be used