JLab USB Laptop Speakers - Portable, Compact, Travel Notebook Speaker for Windows PC and Mac - B-Flex Hi-Fi Stereo USB Laptop Speaker - Black Patent pending flexible design allows you to totally customize your listening experience by flexing the speaker into virtually any position Pumps your digital audio through a 2-watt digital amp and two high output micro drivers Uses only USB power, no wires or batteries USB 5V Input Power Two 36mm paper cone drivers