"USB-BT40LE" is a Bluetooth® 4.0 USB adapter compatible with Bluetooth® 4.0 + EDR/LE. It has a compact design that doesn't get in the way even when connected, and easily adds wireless communication with Bluetooth® devices to computers that don't have Bluetooth® functionality. Furthermore, it has an energy-saving design that reduces power consumption by about half when connecting to Bluetooth® Ver. 4.0 devices. Of course, it can also connect to Bluetooth® 2.1/3.0 compatible devices, so you can use various Bluetooth® devices, such as connecting a headset for wireless calls, or connecting a mouse or keyboard. Operation has not been confirmed. Please consider this item as a used product. Thank you for reading to the end.