50W*3.0Hmm 4000Hz 87dB SurfaceMount Buzzer RoteVolt 3V CoilResistance 32ohm MaxCurrentConsumption 50mA SMD Magnetic Buzzer with Passive CircuitApplications: Telephone, Clocks, Medical Equipment, Mobile Phone, Toys, Official Supplies, Note Computer, Microwave Ovens, Air Conditioners, Home Appliance, Automatic Controlling Devices.Features: with Passive Circuit(50W*3.0Hmm 4000Hz 87dB) SMD Buzzer