Features: – USB supply power dirctly, easy connection. – Large diameter full frequency vibration loudspeaker, deep bass, rich mid range and clear treble. – Rear bass trumpet, bass thick, to bring you high-quality bass. – High magnetic speaker, give you a different listening experience. – Can connect PC, laptop, mobile phone, MP3, MP4 , DVD. Version comparison Standard version: high-definition full-range speakers, lossless sound quality, main cable length 1.3 meters Upgraded version, dual diaphragms and dual speakers, 4D shocking stereo sound, main cable length 1.6 meters Specifications: Product name: desktop to the box Product line length: 1.3/1.6 meters Input power: DC5V Speaker specifications: 50mm*2 Frequency response: 25Hz~20KHz Signal to noise ratio: ≥80db Power supply mode: USBDC5V Input interface: 3.5mm stereo input Adjustment form: wire-controlled volume adjustment Color options: black/white Product size (single): 64*61*86mm Product weight: 265g Package Included: 2*speaker (with audio cable and USB power cable on the back