The Passive Buzzer 9042 is a 16 ohm electromagnetic buzzer with a round shape and a size of 9x4.2mm. It operates on AC current and has a sound level of 80dB. This mini buzzer is suitable for PCB mounting and can handle a minimum temperature of -20°C and a maximum temperature of 66°C. With a supply voltage range of 1.5-5V and a current rating of 50mA, this passive buzzer is an ideal electronic component for various industrial and office applications. Made in China, this buzzer is a reliable and compact option for providing audible notifications.