The Bluetooth transmitter receiver adapter's several functions may be modest, but its ability to broadcast wireless audio is not. Put this versatile transmitter and receiver in your laptop bag or backpack and you'll always be prepared.

Features:

Switching to Bluetooth wireless audio is a breeze and can be done with any existing speaker, amplifier, TV, or car entertainment system.
The HG external singal antenna in the Bluetooth 5.0 version ensures a strong and reliable connection from up to 130 feet (40 meters) away.
Watching TV and movies has never been better thanks to the lossless sound quality, HD HiFi subwoofer effects, and low latency.
Enjoy the show with your loved ones without disturbing those around you thanks to the device's ability to connect to two Bluetooth headphones at once.
Power-off memory chip allows for automatic pairing with previously used devices while retaining the last used mode, song, frequency, etc.
If your TV, stereo, or CD player doesn't support Bluetooth, you can still listen to your music wirelessly through your headphones or speakers if you switch to "Bluetooth Transmitter" mode.
By switching to "Bluetooth Receiver" mode, you can send music from your Bluetooth-enabled mobile device, tablet, or computer to your wired stereo, speakers, headphones, or car stereo via the 3.5mm/RCA audio cord.
Plug your U-disk directly into this player, and the music will play through your home stereo, speakers, headphones, or car stereo via the 3.5 mm or RCA audio cord.
This 3in1 Receiver Transmitter adapter's 3.5mm/RCA cable ensures compatibility with a broad variety of electronic devices, including but not limited to desktop and portable computers, laptops, home audio systems, headphones, cellphones, MP3 players, CD players, vehicle stereos, and more.

Specifications:

Bluetooth v5.0 with enhanced data rates
In Bluetooth, the A2DP/AVCDP protocol is used for audio and video transmission.
RCA/AUX/USB Interfacing
Frequency S/N Ratio 10 Hz - 20 kHz Response An extremely high ratio (>90dB)
>0.02% Distortion + Noise
Maximum 40 meters/130 feet of operational range (without any blocking objects)
H30 x W108 x D81 mm 
About 77g in weight

Package Includes:
 
Bluetooth Transmitter & Receiver Adapter - 1
USB Type C Charging Cable - 1
3.5mm to RCA Audio Cable - 1
User Manual - 1