Using high-end integrated for chips, the product has lossless sound quality, low latency, and high compatibility. And with excellent audio and low latency via -Adaptive, HD and -LL codecs, you can enjoy it without experiencing voice lag when watching . (Note: Do not use while charging.) Designed with the latest Bluetooth 5.2 technology, it has four times the range and twice the speed of older versions of Bluetooth, providing a more stable wireless connection for your devices. TX compatible codecs: /-Adaptive/ LL/ HD/; RX compatible codecs: /-Adaptive/ HD//AAC. NOTE: The transmitter and headphones used must meet the same standards. (For example: the sending device supports audio decoding " LL/ Adaptive", while the receiving headset only supports audio decoding " Adaptive", so LL cannot be sent). The audio source of the TV does not support Bluetooth connection. Easily go wireless and enjoy music with Bluetooth headphones. Bypass connects the input directly to the connected output and neither sends nor receives. The dual link feature allows two Bluetooth headsets/speakers to be connected at the same time and audio be played through both devices simultaneously. The AK8675Pro comes with the highest Bluetooth technology and comes with dual antennas. After testing, the range of the long-range Bluetooth adapter can reach 20m. Note: Operating range may be affected by physical obstacles such as Wi-Fi routers, wireless TV adapters, walls, metal barriers, and also depends on the receiving device. Material: abs colour: Black Package Contents: 1 x audio adapter 2 x audio cable 1 x charging cable 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.