Standard Raspberry Pi 40PIN GPIO extension header, supports Raspberry Pi series boards, Integrates WM8960 low power stereo CODEC, communicates via I2S interface.; Integrates dual high-quality MEMS silicon Mic, supports left & right double channels recording, nice sound quality.; Onboard standard 3.5 mm earphone jack, play music via external earphone.; Onboard dual-channel speaker interface, directly drives speakers, Supports sound effects such as stereo, 3D surrounding, etc.