Based on the for 40PIN GPIO interface, suitable for series motherboards Adopt PCM5122 professional stereo codec chip, controlled by interface, and audio transmitted via I2S interface Onboard standard 3.5mm headphone jack, you can through external headphones Onboard port, suitable for various working scenarios such as speakers and amplifiers The maximum supported sampling frequency is 384KHz,Supports up to 32-bit resolution Battery Included:No Compatible With:FOR Accessory Type:Extension Board (The product printed words depending on the batch, but this does not affect use) Color: As Shown Material: PCB Package Contents: 1 x Audio Board Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.