Specifications:Mini USB bluetooth-compatible adapter with high speed up to 3Mbps.Realizing the wireless connection between computer and other bluetooth-compatible devices.Universal USB interface to support most devices.Lightweight and compact, easy to carry for different usage.Item Name: USB bluetooth-compatible AdapterMaterial: ABSBluetooth Version: BT4.0Speed Rate: up to 3MBpsFrequency: 2.4-2.4835GHzFeatures: Portable, Stable Signal, Music Receiver, WirelessLength: 3cm/1.18" (Approx.)Width: 1.8cm/0.71" (Approx.)Thickness: 0.7cm/0.28" (Approx.)Notes:Due to the light and screen setting difference, the item& 39;s color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x USB bluetooth-compatible Adapter1 x CD (Laptop Not Included)