Do you mean you want to turn off the bluetooth adapter or converse the TX mode to the RX mode?
Cable Free for Audio: The UGREEN Bluetooth Transmitter Receiver is ideal to add Bluetooth wireless streaming capabilities to your entertainment home stereo system or stream music to your Bluetooth headphone and speakers.
Dual Transfer Mode: This Bluetooth audio adapter equipped with a switch to set it in Transmitte and Received Mode. You can connect your computer, CD Players to your Bluetooth Headphones or speaker. Besides, it also enables to turn your old stereo to Bluetooth-functional speaker to play music on it from your smartphone.
Bluetooth 4.2 Version(AVRCP 1.6 and A2DP 1.3): Compared with 4.1 Bluetooth Transmitter / Receiver, the Bluetooth 4.2 aux adapter features aptX low latency technology and AAC / SBC codes, freely to enjoy clear HiFi stereo sound without sync delay. NOTE: The aptX low latency is only supported in TX mode.
This Bluetooth audio adapter features a built-in rechargeable battery so you can enjoy wireless audio up to 10 meters and last for around 10 hours on a full charge. It is also available for charging and playing simultaneously.
Broad Compatibility: With the included 3.5mm cable and 3.5mm to 2RCA cable, this Receiver Transmitter adapter can widely be used on your computer, laptop, home stereo system, headphone, smartphone, Mp3 player, CD player, etc.
Bluetooth Codecs: AAC / SBC / aptX
Frequency Range: 2.402GHz-2.480GHz
Micro USB port for power supply (5V)
Battery Capacity: 3.7/200mAh
Charging Time: 2.5h
Rx Operating time: 10h
Tx Operating time: 12h
1 x Bluetooth 4.2 Transmitter/Receiver
1 x Micro USB Power Cable
1 x 3.5mm Male to Male Cable
1 x 3.5mm Female to 2RCA Male Cable
1 x User Manual