Docooler Wireless Bluetooth 4.1 Audio Receiver Music Box Adapter is one of the best Bluetooth transmitter for traditional headphone, speaker and even for some the vehicle that has aux. This Bluetooth adapter gives you clear sound with no static when you use it in your vehicle, and it is better than the FM Transmitter. Play your favorite music without a cable. It is very easy to pair, and it has On/Off button and volume-up and volume-down.

The adapter has Bluetooth version of 4.1 technology ensures transmitting strong signal in high quality and high speed. The Bluetooth range covers up to 10-meters in open space without obstacles. With this kind of rang it needs a very strong power that is why it comes with a built-in 180mAh Battery ensures up to 4.5 hours working time.

This Bluetooth adapter is really for all traditional headphone, because it comes with a built-microphone which allow you to receive hands-free calls ensuring driving safety. Again, it has a multi-point connection function which allows you to switch between two phones without turning the other one off. Easy to switch between personal and business phone.

Compatibility
This is a Bluetooth adapter with a 3.5mm audio port design, which makes it support almost every Bluetooth device, that is Android, iOS, traditional headphones, speakers, PC, tablet, and any other device with aux.

Final Verdict
One thing that makes me like this product is that you can convert any stereo system to a Bluetooth-enable device. Besides that, it is portable, and it comes with a clipper which you can use when you are doing a workout or any activities. It does not take much time to charge. It is small, portable, durable and last longer. It is very easy to use. It is the best Bluetooth audio adapter.

Cons
- it is Not waterproof.
- To me, the battery lifespan is not enough when you want to spend a long time outdoors.
- It does not come with a display.
- It is made up of plastic.