Description M5Stack Passive Buzzer Unit is a compact passive buzzer module designed for projects that need a simple sound output device driven by an external signal. Operating with a 4kHz buzzer signal and delivering audible output up to 72dB at 10cm under rated input conditions, this module is a practical choice for audible alert module builds, reminder systems, and embedded sound notification tasks. Features This buzzer unit is driven by a 4kHz oscillation signal. This passive buzzer module can reach up to 72dB at 10cm under rated conditions. The module uses a 4kHz buzzer signal with 1/2 duty square-wave drive. Its protective housing helps shield the buzzer structure during integration. It works well for audible alert module designs and embedded sound notification output. Specifications Product Passive Buzzer Unit Drive Frequency 4kHz 1/2 duty square wave Power Consumption 5V@86mA Net Weight 3.5g Gross Weight 8.5g Product Size 24 × 24 × 8mm Packing Size 93 × 138mm Applications This buzzer unit is suitable for alarms, reminders, status indicators, portable devices, and control systems that require embedded sound notification. Because this passive buzzer module depends on an external drive waveform, it is especially useful in projects that need flexible tone generation, a clear 4kHz buzzer signal, and dependable audible alert module behavior. Product List 1 × BUZZER Unit 1 × HY2.0-4P cable (20cm) Other Content Resources M5Stack Passive Buzzer Unit Official Docs FAQ What is this module mainly used for?It is a passive buzzer module for reminder tones, alarms, and embedded sound notification. Why choose this module?This unit gives simple waveform-driven sound output with a stable 4kHz buzzer signal and compact audible alert module integration.
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