FeaturesBluetooth V4.0A2DP CompatibleUSB 2.0 compliant、 compatible with USB 1.1Can connect to 2 devices simultaneouslyCrisp and Clear Sound QualityEncryption and authentication ensure safe、 secure communicationsLED indicator shown statusSpecificationsInterface£ºUSB 2.0Colour£ºBlackWeight£º15gTransmission£º10 metresCharging time£º1.5 hoursOperating time      6 hoursDimensions: Diameter = 46mm 、 Height = 11mmPackage IncludedH-366T Bluetooth Transmitter3.5mm Audio CableMicro USB Power CableInstruction Booklet