100% Brand New.Product type: Wireless Bluetooth ReceiverVoltage: 5V DCSupport file: A2DPIt can change the wired to wireless and normal speaker to wireless bluethooth speaker.Transmit music without wired from iPod， iPhone， Tablet PC， and other devices with bluetooth functions to the stereo speaker.Compatible with digital products using Bluetooth，such as iPad， iPhone， Samsung， Bluetooth cell phone， Bluetooth Tablet PC.With mirophone and hand-free phone calls function to a assure safe driving.With car charger port， so can charge from car cigarette lighter.USB port used for charging other devices， like phones.Connect with car or speaker by 3.5mm aux-in jack.Complies with Bluetooth 2.1.Support A2DP V 1.2.LED indicator display when connect.Transmission distance up to 33 feet (10 meters).How to use: 1.Bluetooth music receiver connects diretly to speaker with 3.5mm audio jack. 2.Enable the bluetooth function for the devices such as iPod， iPhone， bluetooth PC， cellphone， search bluetooth devices to find the bluetooth music ? ? ? ?receiver and connect it. 3.After successful paring， then we can play music by.1 x USB Bluetooth Music Receiver