Bluetooth receiver for music sent wirelessly from your phone or computer with a 3.5mm jack. Plug the USB receiver into a powered speakers USB or any USB wall charger for power, then connect the USB blutooth receiver to the speaker by running a wire from 3.5mm jack on the USB to the speaker with the cable provided if your powered speaker has 3.5mm jack. If there isn't a 3.5mm jack on your speaker use our DR6ipod (RCA) or DQ6ipod (1/4 inch) to connect the USB to your speaker. Then just connect to the USB wirelessly from your phone or computer. Unit size 2 x 1 x .5 inches. Weight 0.1 Lb.