tp-link Bluetooth 4.0 Nano USB Adapter UB4A Nano USB adapter supporting Bluetooth 4.0, with a communication range of 20m. - Brand: tp-link - Model Name: UB4A - Bluetooth Version: Bluetooth 4.0 - Class: Class 2 - Communication Range: 20m - Supported OS: Windows 10/8/7 Colors may appear different depending on your monitor environment. ★Please understand that this item is stored at home. The box may have some minor damage.