DescriptionThis item is an electromagnetic alarm buzzer, well-made of premium material, this item is durable and practical use. Designed 5V input voltage, which is an product for industrial use. The buzzer features low voltage, low power consumption and high voice pressure. The set includes 24pcs, which can greatly meet your different needs.Features- Color: Black - Material: ABS - Size: About 1.5 x 1 X 1cm/0.59 x 0.39 x 0.39inch - Voltage range: 4-7V - Sound pressure level: 85dB Operating temperature - Operating temperature: -20~+60 - The buzzer is well-made of premium material, this item is durable and practical use. - The buzzer features low voltage, low power consumption and high voice pressure. - Widely used in computers, printers, photocopiers, alarms and electronic toys. - The compact and lightweight design is very convenient for us to carry and store. - There are 24 practical buzzers in total, enough for you to use.