Bluedio R 8 Drivers Bassy Wireless Bluetooth Headphones with Micro SD Card Slot (Black) Bluedio PPS8 8-driver technology delivers deep, powerful sound for the music you love. The headphone supports Micro SD card music playback (maximum 32G). Simply insert a Micro SD card loaded with audio files and make it enter SD card mode, you can freely enjoy your favorite music. Besides Bluetooth connection, R also supports line-in music playback. Just turn on it and use the included 3.5mm audio cable to connect it with your computer or mobile phone. The ear cushions rich in protein ensure you a long time wearing comfort; the adjustable band makes it suitable for different head forms; the foldable design allows it to be with you wherever you go. The headphone adopts ISSC Bluetooth 3.0 chip, which not only can lower the power consumption, but also can make the signal transmission more stable.