... . 100% bamboo made 2. Support USB,SD/MS/MMC card 3. with PATENT,the 1st item made of bamboo 4. Natual, recycle ... SD/MS/MMC card3. with PATENT,the 1st item made of bamboo4. Natual, recycle, degradableCertification:CE, RoHS, FCCUSB speaker / card speaker / Digital Card Reader Speaker / Speakers, Portable ... . Bamboo is sweat-absorbent and antibacterial The Lastest Bamboo Speaker with double-speaker