Suitable for use with desktop or laptop computers and any device with a 3.5mm audio output. - Powered by the USB port on your device. - A separate USB power Adapter may be used with devices that have no USB port. (not included) - Output: 2 x 5W - Impedance: 3 ohms - Frequency: 90Hz approximately 20kHz - Power Input: 5VDC USB 400mA - Audio Input: 3.5mm jack What's in the box 1 x Turbine Speakers