Active Buzzer Alarm Module DC 3.3-5V

Features:- Passive buzzer features are:- Passive internal shocks without source- so if you can not make it with a DC signal tweet. Must be a square wave 2K ~ 5K to drive it Sound frequency control- you can make a “more than a meter hair Suola” effect. In some special cases- you can reuse a control and LED mouth Active buzzer features are:- An active buzzer with a concussion internal source- so long as it will be called an energized Program easy to control- SCM can let a high-low sound- while passive buzzer did not. Package Includes: 1 x Low Level Trigger Active Buzzer Alarm Module DC 3.3-5V for MCU-Arduino