Feature:? Bluetooth 5.0 Streaming indefinitely by connecting with a charger or get up to 15 hours of playtime without charging thanks to the latest Bluetooth 5.0 and large internal battery.Share great music with your partner by simultaneously pair and stream to two headphones or speakers at the same time.The adapter will even automatically re-pair with existing devices.? Flexible Dual Connection While many adapters on the market only support 3.5mm headphone jack or RCA connection,the adapter edge ahead by also supporting TOSLINK optical cable input or output so your TV with optical sound output can feed the adapter, and your audio system can also become wireless with an optical connection.? No More Lip-sync Delay With aptX supportive headphones and speakers, the adapter (in transmitter mode) can further reduce the latency to only 40 milliseconds, making your TV, movies, and videos a pleasure to watch.? Wireless Receiver Save on the cost of upgrading by giving Bluetooth connection ability to your existing stereo system or wired headphones, and make them capable of wirelessly connect with the latest smartphone, tablets, iPad, and computers. Whether you want to stream music to wireless headphones / speakers or make your old sound system wireless capable, the 2-in-1 Wireless Transmitter and Receiver is your perfect choice. Packed the latest Bluetooth 5.0 technology, dual connector, and many handy features this portable high-definition adapter will make your best music even better.Package List: 1 x Bluetooth 5.0 2-in-1 Adapter 1 x Wired Headphone Cable 1 x 3.5mm 1.64ft / 50cm Audio Cable 1 x 3.5mm Female to 2 RCA Male Cable 1 x USB Charging Cable 1 x User Guide