EC Buying 10Pcs 5V Passive Buzzer Module, Piezoelectric Sounder Board with 2.54mm Pin Header, External Frequency Control for arduino, ESP8266, for Raspberry Pi, MCU Projects

["Passive piezoelectric buzzer requiring external frequency signal to generate sound.","Compatible with microcontrollers for tone and sound signal generation.","Operates at 5V DC working voltage.","2.54mm pin spacing compatible with breadboards and development boards.","Compact PCB structure suitable for embedded systems and prototype circuits."]