NOTE: The item is compatible with windows 10/ 8.1 /8/7/XP. However, on the box there is limited space so the manufacturer do not list all of the versions and just list the most recent versions of windows??Bluetooth 4. 0?? ?C applies the latest Bluetooth 4. 0 and it is backward compatible with Bluetooth V3. 0/2. 1/2. 0/1. 1. Ub400 turns non-Bluetooth PC or laptop into Bluetooth-capable ( PS4 & XBox Controllers for PC Only )??Plug & play or free driver?? ?C plug and play for Win 8, Win 8. 1, and win 10. Supports Win7/XP (driver required for Win7/XP and could be downloaded from website free of charge). it is not compatible with Mac, Linux, TV??Nano-sized?? ?C a sleek, ultra-small design means you can insert the Nano adapter into any USB port and simply keep it there, no matter when you are traveling or at home??Reliability?? ?C enable wireless communication with Bluetooth-enabled computers, printers, phones and headsets. Utilize Bluetooth low energy) technology for energy-saving wireless connectivity??Broad operation range?? ?C with a transmission distance of up to 65 ft, you can enjoy lossless music via your Bluetooth headset without hovering around your computer??Worry-free customer support & ?? - industry leading 24-month and free lifetime 24/7 technical support