This Bluetooth receiver is super mini and portable to carry. Plug in the AUX port then it turns into Bluetooth devices. It features low-consumption and high efficiency, can use up to 5 hours. USB PoweringConvenient to charge. Bluetooth 4.0Low consumption, high efficiency. Compact SizePortable to carry to anywhere. Wide CompatibilitySuitable for car/Bluetooth headphone/speaker, etc. Long Distance TransmissionTransmission distance up to 10m. Hands-Free Calls AvailableIt supports hands-free call function, you can answer phone call while driving. Specifications BrandFamshion NameBluetooth 4.0 Receiver Transmission Range10m InterfaceAUX port ApplicationsPC/headphone/car/speaker, etc. Package Weight50g Product Size5 (exclude the interface) x 1.2 cm Package Contents1 x Bluetooth 4.0 Receiver1 x Charging Cable