This USB speaker can supply power and sound source with 1 USB cable. The connection cable is 1 USB so you can connect it neatly around your computer. In order to achieve an amazing high output that conventional USB speakers cannot output the device, it is equipped with a large capacitor inside. Equipped with a "PRAC (Power Reserving Amplifier Circuit) circuit, which allows high power output when needed. In order to enhance the bass range, the weak point of the small 2ch speaker, the passive radiator unit is installed on the back of the main unit. It is placed parallel to the speaker unit, which resonates well and allows for rich bass playback. High-density MDF wood cabinet for beautiful sound quality. It reproduces a beautiful and comfortable sound that is difficult to reproduce in resin cabinets. The built-in USB DAC transmits high quality data inside your computer digitally to the speaker, and converting it to analog in a speaker with low noise impact, allowing you to reproduce a clear, high-quality sound source. The power on/off switch and volume control switch are installed independently, so you can instantly enjoy the volume of your usual by simply turning the power on. ■Color: Black■Practical maximum output: 25.6W (12.8W + 12.8W)■Frequency response: 85-20,000Hz■Speaker format: Sealed full-range speaker system■Speaker size: 2.75 inches (70mm diameter diameter)■Impedance: 8Ω■Input terminal: USB A connector (compatible with USB 2.0/1.1.1.1.1.1.1 standard)■External output: Headphone jack. (3.5mm) ■ Power supply: USB port (DC 5V 500mA); Housing material: wood; Size: W3.5 x D4.6 x H5.9 inches (90 x 118 x 150 mm); Weight: 4.6 oz (1325 g); Cable length: between speakers / 4.9 ft (1.3 m) computer connection USB cable;