【Easy to use】: This USB car external CD player can be installed in the car with a single cable, just plug the CD player into the USB interface of the factory radio or aftermarket Android navigation head unit, the car external cd player will automatically Identify it and the data will be displayed on your screen. (Android 4.4 and above); play your favorite CDs and listen through your car's factory stereo radio.【Portable and Small, Stable Performance】：This add-on CD player is designed with plug and play, powered by USB port, no external adapter is required. Small in size, the car USB cd player can be placed in the glove box or fixed in other locations. Please note that the unit can be installed vertically or horizontally; to ensure smooth playback, do not turn it upside down or exceed a zero vertical angle.【Widely Compatible with Multiple Formats】：Car external CD player supports Android car navigation and factory radio. Compatible formats are WMA or WAV, MP3 format cannot be played. Enjoy CD-based music and audiobooks through your vehicle's factory radio and sound system. ★★★ NOTE: The factory car radio needs to support the USB flash drive function and must have a player that can play all file formats on the DISC