Excellent slim appearanceBuilt-in microphone for hands-free callingEquipped with USB/TF card slot、 supports MP3 formatSupports FM radioCan adjust volume as you likeCompact size for ease of carrying General SpecsType Bluetooth speakerColor BlackBluetooth Version V2.1 + EDRFrequency Response 150Hz-20KHzLoudspeaker Unit 2Rated Power 2 x 3W (RMS)Signal/Noise －65dBDistortion <1%Impedance －600ΩCompatibility MP3/MP4/MP5 player and external audio devices with a 3.5mm audio jack Packages Includes:1 x Bluetooth Speaker1 x USB Charging cable