🚘Workflow - This 12v bluetooth receiver is mainly used to help cars connect to bluetooth to play music. Its working principle is to connect the bluetooth adapter to the car and the cell phone, send music or voice to the bluetooth adapter through the cell phone, so as to realize the operation of playing music in the car, navigating voice playback, which provides you with clear and stable sound playback and solves the problem of in-vehicle music playback that doesn't work. | 🚘Premium Materials - This wireless bluetooth module connection adapter is made of premium ABS plastic, which has great water resistant and insulating properties, which can prevent the damage caused by accidental water ingress and damage to the car's internal circuitry. In addition, the interface of this adapter is metal, great conductivity can be stably connected to the car, keep playing smoothly. | 🚘Product Details - The size of bluetooth fm transmitter for car is 10.23*1.18*0.40 inches, the diameter of the interface is 0.12 inches, the red line is the positive pole, the black line is the negative pole, using the universal size design of car accessories, suitable for most of the car models on the market, cars, SUVs, trucks, RVs and so on. Please compare the size carefully before purchase in case of size discrepancy. | 🚘Installation Procedure - This car bluetooth adapter is easy to use, just three steps. First, set your car player to the correct mode, then plug the adapter into the car port (red wire connects to the positive side of the power supply, black wire connects to the negative side of the power supply. Finally, connect the adapter via bluetooth from your cell phone, and a flash from the adapter's light means a successful connection. | 🚘Versatile Application - This bluetooth car adapter is widely used, in addition to the main can be applied in the car car player, but also can be used to connect you need bluetooth auxiliary playback devices, cell phones, stereos, laptops and so on. This car bluetooth cable adapter is practical and convenient, it will become a great helper for your rest and relaxation on the road.