Model Number and : This product, identified by the model number Passive Buzzer Module, is manufactured in , ensuring quality and reliability for your various project needs. Application Versatility: Designed to cater to a broad range of applications, this buzzer module is perfect for DIY electronics, alarm systems, and interactive projects, providing audible alerts when triggered. Operating Conditions: The module operates within standard temperature ranges, making it suitable for most environments without the need for additional cooling or heating solutions to maintain its functionality. Power Specifications: With standard dissipation power and supply voltage requirements, this module integrates seamlessly into your existing setups without the need for power supplies. New and Reliable: Each unit is new, ensuring optimal performance and reliability. The standard operating conditions mean it's ready to use in a variety of settings, from educational labs to hobbyist workshops. Passive Buzzer, Low-Level Trigger 1. Module uses S8550 transistor driver 2. Operating voltage: 3.3V-5V 3. Equipped with mounting bolt holes for easy installation 4. Small PCB size: 32mm*13mm Interface Description: 3-wire system 1. VCC: External 3.3V-5V voltage (can be directly connected to a 5V microcontroller and a 3.3V microcontroller) 2. GND: External GND 3. I/O: External microcontroller port 10 Features of a passive buzzer: 1. Passive buzzers do not have an internal oscillation source, so they cannot be made to sound with a DC signal. 2. The sound frequency is controllable, producing a "do-re-mi--sol-la-si" effect. It must be driven by a 2kHz~5kHz square wave. 3. In some special cases,it can share a control port with an LED. Color: As Shown Material: Electronic Component Package Contents: 30*Passive Buzzer Module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.