With n5 Mm Stereo Output, It Can Be Connected To A Variety Of Electronic Devices Like Computer, Mobile, Speakers, Mp3, Car Audio System, Etc.It Can Also Be Plugged In Headphones As A Small Music Player, Professional Stereo Experience, Music Or Call Switch, Free And Relaxed.With Superior Sound Transmission, It Can Be Used For Both Music Playing And Phone Calling.Built-In Large Capacity Battery Provides Up To 300 Hours Standby, No Longer Worry About The Lack Of Electricity.Specifications Item Type Bluetooth Audio ReceiverI/O n5Mm Female Plug, Mini Usb Female PortWorking Time About 4HPower Supply Dc 5VFrequency Range n4GhzType Bluetooth Audio ReceiverQuantity 1 PcProfile A2dpTransmission Range Up To 10M / 33FtColour BlackMaterial PlasticCharge Time About 30 MinBluetooth Version n1Size n4*n5*n8Cm / 0.5*0.6*n3 (L*W*H)You Will Receive 2 X Bluetooth Audio Receiver1 X English Manual The merchant warrants that their products comply with all applicable laws, and are offered only if they comply with Joom’s policies and EU/AU/NZ/US Product Safety and Compliance laws.