Features:100% Brand New.Size: 5 x 5 x 5.3cm(3.32x2.54"/W x L x H， Approx)Portable Speaker Can Be Utilized Virtually Anywhere.Supported Micro SD Card， USB， FMFashion design and Super Mini design is popular among young peopleCompatible with audio output devices through the line in port， such as mobile phone， MP3， MP4 player， PC， notebook， etc.A multiple cable interface including 3.5 mm and mini-USB and USB port (included)Ideal for use in office， home and outdoorImpedance: 4OhmsFrequency response: 200-12000HzSignal to Noise Ratio:> 80 dBSpecifications:FM:87.MHZ-108MHZIP Grade:2.4GHzPower rating: 3WSNR: 45dBRespon Frequency:20HZ-20KHZPower: External battery:3.7v-4.2v