ICIDU USB Bluetooth Adapter Class II (Not the mini version) - Works out of the box with Raspbian and RaspBMC.

Bluetooth adapter shows up in lsusb as '0a12:0001 Cambridge Silicon Radio' - this is notable as most other sources of this chipset do not seem to be available in the US. There are other RiiTek Bluetooth (and non-Bluetooth wireless) devices on the working list. Tested both on builtin USB and on powered USB hub.

RiiTek RT-MWK02+ - comes with a USB Bluetooth adapter that works perfectly for both the RiiTek mini Bluetooth keyboard/mouse and other Bluetooth devices.

Another sample: Product ID: 0a12:0001, pictured here:.

Hama USB Bluetooth 3.0 adapter (Class 1) ~£10 on .uk.

Tesco own brand 'Technika' Nano Bluetooth Adapter has the Cambridge Silicon Radio chipset and works fine, cost £5.97 at time of posting.

Example of above is TOPDIGI UA01 Bluetooth USB Dongle Plug and Play (install bluez package from std repos).

Cambridge Silicon Radio, Ltd Bluetooth Dongle, CNet CBD-120, USB ID 0a12:0001.

Cambridge Silicon Radio, Ltd Bluetooth Dongle (HCI mode) - (USB ID 0a12:0001).

Asus BT400 works out of the box (Openelec) - didn't work for me, I needed this - works out of the box (Recalbox + PS3 controller).

Asus BT211 (USB ID 0cf3:3005), works with firmware-atheros package.

Verified works error-free in Multiple Distros (Openelec, Raspbian, RaspBMC, Xbian) Latest builds eliminate text echo problems.

Asus USBIA-EG (paired with Asus Blutooth Keyboard/Media Center Remote).

2 Working Bluetooth/Wifi Combo adapters.

Does csr v4.0 dongle work with retropie