For an easier use of the WT588-D module with Arduino, it was decided to create a special Shield, this allows to test the module connected to Arduino or stand-alone mode as there are also K1 to K4 keys. There is also a connector for direct connection of a loudspeaker and a connector for connecting an external amplifier. For programming the internal memory of the WT588 module, there is a connector for the SPI interface. there is also the possibility of using the module in stand-alone mode as there is a connector for external power supply. Two LEDs indicate the presence of the power supply and the busy function of the module. [For more information see this page](https://www.adrirobot.it/WT588D-16p/shield_WT588D.htm) ![Kit Shield to use the module WT588-16P with Arduino][1] ![enter image description here][2] ![enter image description here][3] [1]: /editor/20170822/599b10c329b7b.jpg [2]: /editor/20170822/599b10e820dbe.jpg [3]: /editor/20170822/599bfc611a03a.jpg