5pcs Active Buzzer Alarm Beeper Module 3.3V5V for Electronic Toys Alarming Devices Timers

Features: This active buzzer has internal oscillation source, so it will alarm as long as being energized. Convenient program control, single chip microcomputer high and low level can make it sound, better than a passive buzzer. Module is driven with 9012 transistor. Designed with holes for fixing with bolt, convenient to install. External connection of 3.3V5V voltage, can be directly connected to 5V microcontroller and 3.3V microcontroller. External connection of GND3 out external microcontroller IO port. Specifications: Working Voltage: 3.3V5V Module Interface: 3 wire system Size: 3.8*1.3cm1.5*0.5in Quantity: 5pcs Weight: 4g(approx.) Package Includes: 5 x Buzzer Modules This active buzzer has internal oscillation source, so it will alarm as long as being energized. Convenient program control, single chip microcomputer high and low level can make it sound, better than a passive buzzer. Module is driven with 9012 transistor. Designed with holes for fixing with bolt, convenient to install. External connection of 3.3V5V voltage, can be directly connected to 5V microcontroller and 3.3V microcontroller.