TP-Link Bluetooth 4.0 Nano USB adapter

TP-Link Bluetooth 4.0 Nano USB adapter – UB400, USB 2.0, Bluetooth 4.0, Windows 10/8.1/8/7/XP, Bluetooth 4.0 Nano USB Adapter UB400 Quick Installation Guide, 0.58 × 0.27 × 0.74 in (14.8 × 6.8 × 18.9 mm)