Realtek RTL8761B single-chip Bluetooth 5 controller with a UART (RTL8761BTV)/ USB (RTL8761BUV) interface. It combines a BT Protocol Stack (LM, LL, L2CAP,GATT, RFCOMM, SPP, and LE), BT Baseband, modem, and BT RF in a single chip. It is compatible with popular operating systems and supports advanced features like dual-mode Bluetooth, high-quality audio streaming, and enhanced data transfer capabilities. The RTL8761B is commonly used in Bluetooth headphones, speakers, wireless earbuds, smartwatches, and other wireless devices, delivering seamless connectivity and an enhanced user experience. Realtek, known for its expertise in semiconductor and networking solutions, has developed the RTL8761B to meet the growing demand for reliable and high-performance Bluetooth connectivity in the consumer electronics market.