CMI Magnetic Buzzer Indicators CUI Devices CMI Magnetic Buzzer Indicators offer 75dB to 90dB sound pressure levels (SPL) and operate at frequencies from 1900Hz to 3400Hz. These internally driven buzzer indicators come in surface-mount or through-hole mounting styles. The modules operate in a -40°C to +85°C temperature range. CUI Devices CMI Magnetic Buzzer Indicators incorporate a built-in circuit that eases the implementation during the development process. The series offers an ideal solution for consumer electronics, medical devices, household electronics, and industrial applications.