Driver-free plug and play for Win8.1/10/11, just plug it in and it works. Supports Win7 (driver needs to be installed). The driver can be downloaded and installed via the provided link. Low latency, no lag. Synchronized audio and video for watching TV series. True 5.4 Bluetooth chip with anti-interference and long-distance dual upgrade. High-fidelity lossless transmission: enjoy CD-level stereo sound, delicate and high quality. True BT5.4 Bluetooth chip supports BLE. High-performance Bluetooth 5.4 chip with dual mode support and 3Mbps high bandwidth. Higher transmission rate: achieves higher sensitivity, lower latency, and more stable connection. Connect up to 7 devices simultaneously, saving USB ports. Color: A Material: Plastic + Metal Package Contents: 1 x Bluetooth 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 to be slightly different from the actual product. Measurement allowed error is +/- 1-3cm.