1.Buzzer category: mainly divided into two types: piezo buzzer and electromagnetic buzzer.
2.The circuit graphic symbol of the buzzer: the letter "H" or "Ha" is used in the buzzer circuit (the old standard uses "frequency modulation", "pound", "JD", etc.) to indicate.
Working voltage:3.5-5.5V
Working current:<25mA

Package Type:
All goods will pack into cartons and wrapped full of waterproof tape before shipment .

We can accept customized package to meet different requirements :
1.Every item will separately pack into plastic bag ,component, module can be packed in anti static bag .
2.Some fragile products such as the display screen can be packed in bubble bag .
3.Some large machines can be packed in wooden cases.
4.We can label JH code or client's code on package so that customers can check easily after receive goods.