Description:Supports phone/ laptop/ Tablet PCSupports TF Card/ USB/ Audio Input/ FM radio functionModular buddy-jack design: connect a row of mini speakers to get audio performanceExpanded bxs (Bass Expansion system) drives a fuller， richer low-end responseNew， larger 45mm driver delivers precise high for superb soundBuilt-in MicrophoneBluetooth FunctionHandsfree Call FeatureBuilt in Rechargeable Lithium BatteryAudio Devices with 3.5mm Stereo Jack inputColor: RedPackage Content:1 * Bluetooth Speaker1 * USB cableproduct features :1 : Bluetooth version : v3.0 + LDR2 : Bluetooth transmission distance : 10 meters 3 : frequency response range : 100 HZ - 20 KHZ4 : signal - to - noise ratio : 84 DB or higher 5 : sensitivity : 80 DB + 2DB6 : the output power : 3W * 17 : distortion rate of II6 or less 8 : the Speaker specification : 4 �� 3 W 40 MM9 : input power supply : DC DC5V500MAH10 : working voltage : 3.0 T0 5.5 V11 : playing time : 180 min 12 : Charging time : 120 min 3 available modelsDefault Bluetooth modecan long press the button to change theBluetooth mode ------ radio mode ------ aux modeWith the version of the update Voice prompts The tone will changeBluetooth mode ------ for phone or Bluetooth devices ( Bluetooth Connection )radio ( FM )mode ------ radio ( Insert the USB cable as an antenna ) Short press the volume buttons to adjust the channel aux mode ------- for phone Computer TV Consoles 3.5mm audio output ( Using a USB cable )Volume adjustmentPlease check the output volume for mobile phonesYou can long press the button to adjust the volume