The MLT-7525 with Buzzers Magnetic NO 2700Hz 3.6V 2.5 ~ 4.5V 7.5mm x 7.5mm 7.5*7.5*2.5mm RoHS manufactured by Huaneng is an electronic part used in various electronic devices. This component is a 7.5mm x 7.5mm magnetic buzzer, which is activated by a voltage range of 2.5 to 4.5V. This RoHS compliant part produces a sound frequency of 2700 Hz, making it suitable for various audio applications. The buzzer package measures 7.5mm x 7.5mm x 2.5mm.