Product specifications:Bluetooth: V2.1Working Distance:10MVoltage:DC 5VBattery Charge Time:2HLoudspeaker:3WS/N Ratio:>=75dbFrequency Response:120HZ-18KHZDimension:D=80MMNew weight:210gSize:82x75mm Product Feature:1.international advanced bluetooth chip and circuit design techniques,support all bluetooth device;2.with FM function,can search radio station broadcast automatically3.with HI-FI speaker,to sure the clear and bright sound quality4.Support TF Card5.dual power suppor by Mini USB charging/BL-5C lion battery,smart and fast charging6.play music after repairing with bluetooth device for example mobile/MID/TV,the working distance is within 15M.7.Built-in microphone for hands-free phone callPackage Listing:1x Bluetooth Speaker1x Audio Cable1x USB Cable1x User Manualask 1:how to set up the radio?answer 1:I want to say aux cord as an antenna for FM radio.ask 2:how to adjust the volume?answer 2:the volume:press long "-"to turn down the volume,press long "+"to turn up the