Low static consumption, the quiescent current of approximately 2mA, ideal for battery-powered.

Very few external components

The board default gain of 200

Low distortion

On-board volume control potentiometer clockwise to increase the volume

With power indicator light

AD Keyboard module allows you to use an analog port to read the five key states, save for the Arduino IO port, with Arduino sensor expansion board can be done using multiple buttons for interactive work.

5 buttons occupy an analog port, saving resources

Analog acquisition, press the different buttons of different voltage output

High quality Omron button, sensitive and durable

For Arduino platform, compatible with Arduino sensor interface

Provides schematics, Arduino test code