Noted: The model of B5 and B6 just the appearance is different, the functions are the same,so just buy you like.

Description:
1.BLUETOOTH COMPATIBLE: This audio Bluetooth adapter support 3.5mm aux audio, and also compatible with all smartphones, bluetooth audio devices (Bluetooth headphones, Bluetooth speakers and much more),and stereo equipment with audio input port. By pressing the button on the center front, the receiver & transmitter device will start to pair to the next Bluetooth device. 

2.TRANSMITTER RECEIVER MODE: 2in1 design, by using this wireless adapter, you can send and receive all of the audio freely and easily. Transmitter enables your TV, AV Receiver, Radio and other home audio source devices to stream music to your Bluetooth headphones or speakers; Receiver lets non-Bluetooth devices like your home stereo or AV Receiver and wirelessly stream music from your cellphone/PC.

3.CLEAR SOUND: A2DP support voice prompts, gets high-quality audio sound, offers you 30 feet operation range with good performance, gives you a good experience when answering the phone or watching late-night shows. In order to get clear sound, we recommend NOT using the 3.5mm Bluetooth transmitter-receiver while charging.

4.WIRELESS FUNCTION: Want to watch football/baseball / Boxing / Golf / NBA game late at night without waking anyone up? This is a great chose for you. Bluetooth transmitter function wirelessly streams audio to Bluetooth speakers or headphones from your TV or older media devices like portable CD players that lack built-in Bluetooth.

Features:
2 in 1 Bluetooth Transmitter & Receiver, as a Bluetooth Audio Transmitter, B6/B5 is specially designed for the Audio Devices (such as MP3, MP4, TV and PC, etc.) without Bluetooth function. You can connect the Bluetooth Transmitter to the audio devices without Bluetooth function via the included 3.5mm Audio Plug, changing these audio devices into Bluetooth-enabled audio devices, and making it work with Bluetooth-enabled Headset and Speaker; as a Bluetooth Audio Receiver, B6 is specially designed for Car Stereo systems and Home Audio System. It can change the traditional Car Stereo systems and Home Audio System into Bluetooth-enabled ones, and easy to pair with Bluetooth-enabled Smart Phones, laptop, tablet, etc. With this product, you can greatly enjoy music from your phone, laptop, tablet without the hassle of cables.

Specification:
Model number: B6/B5
Bluetooth: V5.0
Transmission Distance: 10m / 33ft
Battery : 300MA
Charging Time:2 H (With a fast charging cable)
Working Time: RX : 12h ; TX: 8H
Charging: Micro USB
Audio Port: 3.5mm
Color: Black

Package includes:
1 X Bluetooth Transmitter&Receiver
1 X 3.5mm AUX Audio Cable
1 X USB Charging Cable
1 X User Manual

Q&A:
(1)Q:Can this work with a CD player with wireless headphones?
A:Yes... Plug your CD player into the device transmitter port then connect via Bluetooth to your wireless headset.
(2)Q:Can this be placed behind a TV and still work from around 3 metres away, or does the bluetooth connection require line-of-sight for that distance?
A:The Bluetooth transmission up to 10 meter.
(3)Q:Does it work with AirPods ?
A:I have not tried that. If this can pairing your devices, it works.