Please note that we do not recommend you to use B06T5 to watch TV if your bluetooth headsets do not support aptX low latency, or your headsets are airpods/bose/sony, as there would be a significant delay. Besides, it is recommended to listen to music when connecting with two Bluetooth headsets, but not suitable for watching TV as it would also cause ultra high latency. Please contact us for a free return or exchange if there is a disconnection problem. Please note that B06T5 is not suitable for airpods pro/airpods gen/airpods max, some Sony bluetooth headsets, and music instruments such as guitar. Please ensure that you have set B06T5 to TX mode before pairing with Bluetooth headphone. ?Attention?The optical input of B06T5 only works in TX. In TX mode, when using the optical fiber interface on the TV, it should be connected to the output port of the TV and the input port of B06T5. Set your TV to PCM output ( : - - - ), otherwise it will produce noise. Optical output only works in RX, in RX mode, connect to the optical output port of B06T5, and connect to the audio input port of the speaker. ?One Button Reset?YMOO bluetooth receiver has a RESET button, press for 2 seconds can reset the pairing mode and clear all pairing history, which can solve 99% of pairing problems. +/- can realize volume/song switching, short press to adjust volume, long press to switch songs. ?130ft Working Distance?In the absence of obstacles, the effective working distance can reach up to 131ft in receiver mode (RX), and up to 82ft in transmitter mode (TX). Don't worry about the Bluetooth connection being interrupted due to the short transmission distance of the Bluetooth transmitter when using this device. ?2-in-1 Transmitter and Receiver?In TX mode, the Bluetooth transmitter is connected to the audio output of non-Bluetooth devices such as TV/car/airplane entertainment (B06T5-INPUT) through 3.5mm jack/optical jack; in RX mode, the Bluetooth receiver can be connected to the wired speaker audio input (B06T5-OUTPUT) to receive audio from the smartphone/tablet via the Bluetooth connection. Support pairing with 2 wireless headsets in TX mode, and connect two mobile phones in RX mode at the same time. ?Digital Optical & 3.5mm Aux In/Out?The Bluetooth transmitter has a 3.5mm jack and a digital optical audio port, it provides up to 2 audio connections to connect to various audio devices with Bluetooth and non-Bluetooth functions. (In RX mode, optical fiber and AUX cannot be output at the same time.). ?Newest Bluetooth 5.3 and Aptx HD+LL?YMOO Bluetooth adapter is equipped with Bluetooth 5.3 chip and the latest Qualcomm core control chip, the connection is more stable. RX mode supports SBC/AAC/APTX/APTX-HD/aptX-Adaptive, and TX mode supports SBC/APTX/APTX-LL/APTX-HD/aptX-Adaptive audio decoding format. Using advanced aptx low-latency decoding technology, the delay is less than 40ms, which can effectively solve the problem of sound and image mismatch.