Product description Color: Black, Black White, Black Red Material: ABS Connection: USB 2.1 with cable Cable length: 1 m Audio connection: AUX 3.5 mm Power supply: DV 5 V and USB 5 V. Adjustment knob: volume, treble, bass Output power: 3 W. Dimensions: approx. 95 * 115 * 128 mm (main speakers), 62 * 63 * 75 mm (side speakers) Scope of delivery: 1 x main speaker 2 x side speakers 1.Superior Sound Quality Performance: Enjoy your music through dual high-performance loudspeaker. Ensures enhanced clarity and fidelity. Place them on both sides of the computer and the sound will reach your left and right ears at the same time, producing a similar stereo sound. Suitable for listening to music, watching movies or playing games at home or office. 2.Unique Design: Rear 3 inch bass speaker lets out a superior bass sound. And the air guide in the front makes the bass sound steady and undistorted. 3.Simple operation: Treble and bass independent adjustment, rotate the knob and adjust, shows perfect interpretation of all kinds of music. 4.Wide Compatibility:Lightweight and portable, convenient to carry. Suitable for cellphone, tablet, laptop, PC, desktop computer and other audio devices. 5.Bluetooth connection Speaker Bluetooth , 10m range, Quick pairing any Bluetooth-enabled device, such as Android cellphones, iPhone, iPod and so on. If you don't use Bluetooth connection, you can use a 3.5mm AUX cable to plug in the speakers and the other side to insert auxiliary connection device of a smartphone, computer, MP3, MP4, TV and so on.