Large Knob: You can easily adjust the volume to listen to your favorite TV shows/movies/music at your preferred volume without having to go through the TV remote or cell phone every time. While driving, you can use this knob to adjust the volume, answer/reject/redial calls for a safer trip. The knob comes with a very nice LED breathing light so you can easily find and operate it whether you are in the car or at home at night
Digital Display: Let you clearly see the current mode and working status: TX, RX, USB, TF, show the volume level when you adjust the volume knob, show the song time when playing music from USB or TF card. Make your use more intuitive and simple
Easy to Operate: There are 3 small buttons next to the knob, long press the center button for 2 seconds (don't move your finger when you press it), the adapter will turn on and you can see the LED screen light up. Slide the side switch left or right to switch the receiving and transmitting mode
Trustworthy After-sales Service: Once purchased, you are our valued customer. If you have any questions or need technical help, please contact us through Amazon message or the contact information in the user manual