WTV020-SD-16P audio/sound module for arduino Operating voltage: DC2.6 ~ 3.6 V Support capacity of 32 m ~ 1 gbit card; Support the FAT file system, an SD card for storage carrier Pieces support broadcast WAV and 4 bit ADCPM format file Mixer WTV master control chip is WTV020-16 SOP and WTV020-20 SOP two kinds of packaging, both compatible