Bluetooth 2.1 Usb Adapter (Ultra Small Bluetooth 2 Usb Adapter 10M) Very compact sized USB adapter to add Bluetooth 2.1 wireless technology to your notebook or PC Ultra small design that fully integrates with your notebook when plugged in, no need to remove adapter Instantly use your Bluetooth mouse on your notebook without (un)plugging the USB adapter Create a wireless connection between your notebook/PC and Bluetooth devices Bluetooth 2.1 technology: up to 3 times faster than standard Bluetooth. Also works with previous Bluetooth versions.