OM Audio Mantra Portable Bluetooth Speaker (Black) Hand-crafted and portable, Mantra is light enough to travel with you no matter where your path may lead, yet still powerful enough to deliver sound to touch your soul. Enjoy one Mantra individually or together with a second Mantra for a true wireless stereo experience. Wrapped in a hand-crafted walnut cabinet that speaks to the beauty of nature. The signature shape and lightweight feel has universal appeal, yet is perfect for delivering a personalized listening experience. That's why we created a battery that exceeds 13 hours and included a USB charging cable and carrying bag for keeping the energy flowing.