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Technical parameter: 1.Input power:USB direct plug power supply(5V 500mA) 2.Speaker specifications:2 inches X2 3.Frequency response:25HZ-20KHZ 4.Impedance:4 o 5.Power supply mode:USB DC5V 6.Audio material:high gloss plastic 7.Power amplifier output power:RMS 3W *2 8.Input interface:3.5mm stereo line input 9.Adjustment form:wire-controlled volume adjustment 10.Full-range speaker:2.0 inch paper-based hemp pulp fiber cone Feature of product: 1.stylish design,light and smart,easy to carry,it is personal companion for home travel 2.simple to use,save space,with 2.0 channel stereo 3.the original imported digital power amplifier increases the sound source reproduction to more than 99.3%. which is close to lossless 4.the use of reinforced magnetic, high elastic rubber edge full-range speakers,the sound is powerful and exciting 5.the appearance is simple,fashionable and dynamic,and the music performance is more perfect 6.the cavity conforms to the principle of acoustic design ,with a soft tone and clear layers , 7.green low-energy digital power amplifier,high effciency and energy saving 8.USB power supply cable plug, which can be directly inserted into any USB port 9.can link to any audio source using 3.5mm standard plug