Havit brings to you HV-SK430 cheap price 2.0 USB speaker portable. Small size computer speaker, USB plug. Nice sound quality. Simple design, suitable for computer and notebook. Shining surface, always matching your computer or notebook- Speaker function parameters Size: 72 x 82 x 75mm- Output power: 2.5W x 2 (RMS)- Impedance: 4Ohm- Frequency response: 120 HZ-20KHZ- Power input: 5v (USB).