ITEM NAME:AC/DC 110V 20mA Equipment Alarm Signal Indicator Light Flash Buzzer H7Y1 AC/DC 110V 20mA Equipment Alarm Signal Indicator Light Flash Buzzer H7Y1 This flash buzzer is suitable for electric power, telecommunications, machine tool, ships, textile, printing, mining machinery equipment in the line for instructions signal, forecast signal, accident signal and other instructions by signal. The US users shoulder prepare a voltage converter (not included here ) to make the counter work normally. Product Name : Flash Buzzer; Model : AD16-22SM Volume Level : 80dB; Bearing Voltage : AC/DC 110V 20mA Size : 6.5 x 2.8cm / 2.5" x 1.1"(L*D); Material : Plastic, Electric Parts Color : Red, Black; Weight : 22g Package Content : 1 x Flash Buzzer Note:Light shooting and different displays may cause the color of the item in the picture a little different from the real thing.The measurement allowed error is +/-1-3 cm.