sada d-202 deskcomputer speaker notebook small speaker mobile phone usb 2.1 mini speaker low cannon

interface type: usbconnection method: 3.5 mm audio socketsound: 2.1power mode: usb powerextended storage: not supportedtrumpet: 3effective distance: 10 metershousing material: plastic: plasticbox material: plasticafter-sales service: store three bagsinvoice: remarks of the invoice are requiredpacking list: main speaker * 1 satellite box * 2 manual * 1speaker adjustment method: knob