Avantree Audikast 4 Auracast & Bluetooth 5.4 TV Transmitter for Headphones Selected Personal Listening Devices, aptX Adaptive HD, Optical AUX Output, Future Ready Upgradeable

【FOR Auracast And Classic Bluetooth Users】Two modes: Auracast for Auracast headphones, speakers, and only the assistive listening devices shown in the images. Classic Bluetooth audio transmitter for TV headphones or speakers (only one device at a time). For assistive listening devices, we recommend Audikast 4HA. 【Watch TV At Your Own Volume】Connect to your TV via optical or AUX output for private TV audio listening through headphones or hearing devices. Some TVs without optical or AUX output are not supported. NOTE: When using Optical output, the TV audio format must be set to PCM. 【Stable And Future-Ready Connection】Built on Bluetooth 5.4 with Auracast support and USB-C firmware updates, designed to stay compatible as Auracast devices continue to evolve. 【NOT FOR Incompatible assistive listening devices】Auracast works only with assistive listening devices that are Auracast-ready. Many assistive listening devices on the market are not Auracast-ready yet – please check the compatibility list in the images before purchase. 【IMPORTANT NOTE – Classic Bluetooth Limitation】In classic Bluetooth mode, only one headphone or speaker can be connected at a time. Multi-listener audio sharing is available only in Auracast mode.