TRENDnet Low Energy Micro Bluetooth 4.0 Class I USB 2.0 with Distance up to 100Meters/330 Feet. Compatible with Win 8.1/8/7/Vista/XP Classic Bluetooth, and stereo headset, TBW-106UB Class I Bluetooth 4.0 with 100 meter (330 ft.) range Up to 3 Mbps data transfer rate Slightly larger than a penny Windows compatible Enhanced Data Rate (EDR) support improves performance Stereo audio support Bluetooth Low Energy protocol