Adopt true 5.4 chip, which truly conforms to the technical specification of Bluetooth 5.4, and has dual-mode low-power transmission. Longer transmission distance: 150m long transmission distance (no barrier), single/double antenna design, effectively improving transmission distance. More stable transmission rate: 3Mbps transmission rate, providing high-speed file and audio data transmission. Ultra-low delay speed link, intelligent sleep wake-up to save energy, 24-bit check to resist interference, adaptive frequency hopping to reduce crosstalk. Complete backwards compatibility Bluetooth 2.0, Bluetooth 2.1, Bluetooth 3.0, Bluetooth 4.0, Bluetooth 5.0, Bluetooth 5.1 and other specifications.<br><br>5.4 Bluetooth adapter is a new product with high version and high speed, with strong compatibility, high speed and stability, and longer receiving distance. Applicable : it supports Windows7/win8.1/win10/11 mainstream ! Realize wireless Bluetooth connection between computer and other Bluetooth protocol devices (Bluetooth headset/speaker/mouse/keyboard/gamepad/mobile phone/printer, etc.) for audio, data and image transmission. Colour:black Material:plastic<br><br>Package Contents: 1 * USB Bluetooth adapter<br><br>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.