1. Logilink BT0015 Bluetooth 4.0 USB 2.0 dongle , producer’s site : http://logilink.de/showproduct/BT0015.htm Works out of the box, no powered hub needed. It features Broadcom’s BCM20702A0 chipset and has native support.
2. GMYLE Bluetooh 4.0 USB 2.0 dongle, works out of the box, there is no need for extra power, the chipset is : Cambridge Silicon Radio, Ltd, CSR8510 A10 and rated by manufacturer as needing 100mA ( 500mW power consumption ). Producer link : http://www.gmyle.com/products/micro-usb-bluetooth-4-0-dongle-dual-mode-w-low-energy-technology-wireless-adapter-broadcom-bcm20702-chipset-x10
3. Avantree DG-40 or Avantree BTDG-40-BLK , works out of the box, without powered hub, chipset Cambridge Silicon Radio, producer’s site : http://www.avantree.ro/bluetooth-adaptor/bluetooth-adaptor/adapator-usb-bluetooth-40.html