I wanted a portable hands-free device for my husband to use while working. He switches work vehicles constantly throughout the day and may not always have access to built in hands-free devices. In our state, it is illegal to use or touch (with any part of your body) mobile devices while operating a vehicle and extremely dangerous to do so as well. I bought this Bluetooth transmitter because it can be easily moved from vehicle to vehicle and will auto pair with his phone every time. This transmitter also has two fast charging USB ports so he can charge his devices quickly. The transmitter can be used for receiving phone calls and playing music. It can play music by connecting to a device through Bluetooth, using an AUX cable, USB drive or by using a TF card. The aux cable, USB drive and TF cards are not included with this transmitter so you would need to purchase those separately if you intend to use them.
The transmitter can automatically find a blank FM channel to broadcast on when I press the "Auto" button. This transmitter has a large 1.8 inch color LCD screen and a built in microphone. It has a gooseneck stand which rotates 360 degrees to get the best viewing angle. The transmitter has a pleasant female voice that will announce the phone number of the incoming call and certain other features of the transmitter. It will also automatically switch from playing the music to call mode. The LCD display will also show the phone number, the voltage status of your vehicle's battery, an equalizer, song titles and more. There are tons of features on this transmitter so it will take us awhile to play with them and figure them out but the transmitter does come with an instruction booklet to get us started or we can always email the seller with questions.
This is a good Bluetooth FM transmitter but the only issue we have found so far that my husband doesn't like is that he can not listen to regular FM radio channels while he is using this device. If he wants to listen to music, he has to cast it from his phone or use a TF card, USB drive or Aux Cable.