Description Are you looking for a professional, yet affordable buzzer module? Are you in search of a sturdy, trustworthy tool that can do multiple work at once? If yes, look no further Our professional buzzer module must meet your needs. It is one of the best choices for you. Features - Color: Blue.- Size: 3.80X1.30X1.00cm/1.49X0.51X0.39 inch.- Material: Plastic.- Working voltage: 3.3V-5V.- Active piezo electronic buzzer module with low level trigger and continuous sound output. It will alarm as long as you are energized.- Designed with holes for fixing with bolt, so it is very convenient to install.- Single chip microcomputer high and low level can make it sound better than a passive buzzer.- An active internal buzzer with shocks source, so long as a power will be called 2 program easy to control, SCM can allow high and low sounds, while passive buzzer cannot.- It is manufactured with professional technology to ensure the of the product and can work for a long time.Packing list: 5 x buzzer modules