Description This item is a electronic alarm buzzer, well made of premium material, this item is durable and practical use. Inside is a plus the driver circuitry. Designed with 2 wired connctor, which is convenient for connecting. features low voltage, low power consumption and high voice pressure. product for industrial use. Feature - Color: Black - Material: ABS and electric components - Size: 2.2x2.2x1cm - Sound Pressure Level: 85 - Rate Voltage: 12V DC - Operating Voltage: 3 - 24V - Frequency: 3000 + / - 500Hz - Drive Method: Drive Circuit Built in Mounting Holes - Well made of premium ABS material, this item is durable and practical use. - Inside is a plus the driver circuitry and electric components. - -24V rated voltage, 2 wired connctor, convenient for connecting. for industrial use. - features low voltage, low power consumption and high voice pressure. - Warm Tip: Dear buyer, Due to lighting effect, monitor's brightness, manual measurement and etc, there could be some slight differences in the color and size between the photo and the actual item. Sincerely hope that you can understand! Thank you! Drive Method: Drive Circuit Built in Mounting Holes Well made of premium ABS material, this item is durable and practical use. Inside is a plus the driver circuitry and electric components. -24V rated voltage, 2 wired connctor, convenient for connecting. for industrial use. features low voltage, low power consumption and high voice pressure. - Warm Tip: Dear buyer, Due to lighting effect, monitor's brightness, manual measurement and etc, there could be some slight differences in the color and size between the photo and the actual item. Sincerely hope that you can understand! Thank you!