Features: The latest Bluetooth V2.1 Technology (Bluetooth EDR Technology) Provides additional bandwidth to the Bluetooth radio, the bluetooth music receiver can also remember as many as 6 paired devices, even if the user has a plurality of bluetooth devices, he or she also does not worry there will be different colleagues use or confusion. Plug in the USB port of the home stereo system that is played with the U disk and do not require any external connections. Specifications: Bluetooth 2.1+EDR Support A2DP, AVRCP, AVDTP, HFP and HSP Powered by 5V DC Transmission rate: 100(Mbps) Transmission Distance: up to 10m Power supply mode: USB-power Operating frequency: 2400 (MHz) Package included: 1 x USB Bluetooth Dongle NORetail box,Packed safely in bubble bag.