[Transmitter & Receiver]Upgraded lightweight 2-in-1 portable Bluetooth V5.0 transmitter and receiver; able to use as a transmitter or receiver; it can be paired with 2 Bluetooth devices or speakers at the same time.It provide a more stable, faster transmission, low power consumption. | [Flexible Dual Connection]While many adapters on the market only support 3.5mm headphone jack or RCA connection, the audio 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. | [Low 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. | [Longer Battery Time]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. The adapter will even automatically re-pair with existing devices. | [Cable-Free Roaming]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.