Avantalk BTDG-20 Bluetooth Wireless USB V2.0 + EDR Class 2 Mini Dongle Adapter for PC / Laptop / Desktop / PDA / Printer Full 1 year warranty. Super small Bluetooth Dongle, suitable for connect to PC all the time Support Bluetooth Audio for VoIP Support Bluetooth Stereo (A2DP & AVRCP) EDR technology increase the data transfer speed to 3 times faster than normal Bluetooth on the market.