Using a true 5.4 Bluetooth chip, in line with Bluetooth 5.4 technical specifications, LMP: 13.X, BLE/ dual-mode low-power transmission. Farther transmission distance: 150m ultra-long transmission distance (unobstructed), antenna upgrade, strong signal. More stable transmission rate: 3Mbps transmission rate, providing high-speed file and audio data transmission. Driver-free use: supports driver-free plug-and-play, no CD installation required, convenient and simple. Ultra-low latency and high-speed connection, intelligent sleep energy saving, 24-bit check to resist interference, adaptive frequency hopping to reduce crosstalk. Backward compatible with Bluetooth 2.0, Bluetooth 2.1, Bluetooth 3.0, Bluetooth 4.0, Bluetooth 5.0, Bluetooth 5.1, Bluetooth 5.3 and other specifications. USB2.0 interface (universal USB3.0). Can connect 7 devices at the same time, strong compatibility, one adapter can meet multiple needs. Technology upgrade, one-time connection, automatic reconnection for subsequent use, no need for secondary pairing. Applicable : Supports mainstream operating systems of Windows7/win8.1/win10/11! (Win8.1/10/11 driver-free use) Realize wireless Bluetooth connection between computer and other Bluetooth protocol devices (Bluetooth headset/speaker/mouse/keyboard/game controller/mobile phone/printer, etc.) for audio, data, and image transmission. Colour:Black Material:plastic Package Contents: 1 x Bluetooth 5.4 Adapter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.