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 CRC 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. 5.4 Bluetooth adapter is a product with high version and high speed, with strong compatibility, high speed and stability, and longer receiving distance. Applicable operating system: it supports Windows7/win8.1/win10/11 mainstream operating system! 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 Package Contents: 1 * USB Bluetooth adapter