With built-in antenna design, Bluetooth-compatible adapter can achieve 0-20 meters distance transmission.Using Bluetooth-compatible 5.0 version, the adapter can achieve fast search for devices, fast connection, fast transmission, and stable performance.Made of high-quality ABS material, it is lightweight and durable.The length of the product is 2.56cm, the width is 1.4cm and the height is 0.55cm.The adapter supports wireless devices, such as a keyboard, mouse, speaker, some headsets.Item Name: Bluetooth-compatible AdapterMaterial: ABSChip Model: RTL8761BBluetooth-compatible Version: 5.0+BR/EDRInterface: USB-ASupport System: for Windows 7/8/10Features: Plug and Play, Fast Transmission, Stable SignalSize Details: 2.56cm x 1.4cm x 0.55cm/1.01" x 0.55" x 0.22" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Bluetooth-compatible Adapter