Bluedio R Plus Wireless Bluetooth Headphones with Micro SD Card Slot (White) Bluedio PPS8 8-driver technology delivers deep, powerful sound for the music you love. Piano baking varnish creates three classical, durable colors for you to choose from. Up to 25 hours of long lasting Bluetooth playback when the battery is fully charged Simply plug in the aux cable to continue enjoying your music when the battery runs low. Micro SD card support if you don't want to carry your phone. *note: SD card not provided