about this project Bluetooth V5.0 and 3 music playback modes: Adopt the latest Bluetooth V5.0 technology and support A2DP, AVRCP, HFP, HSP functions. The connection is stable and stable, and the anti-interference performance is better. Give you a new experience. It also has 3 music playback modes, Bluetooth connection, TF card, U disk to play music (TF card supports WMA, MP3, WAV, FLAC) music playback USB PD 3.0 Type-C and QC3.0 Port: 18W Type-C port and 3.0 Quick Charge port let you charge your device up to 4 times faster than regular chargers. The second is a 5V/1A interface, which can be used for USB music playback. High-Quality Stereo Sound: Built-in microphone and Noise Cancellation Technology (CVC) for clearer and smoother interference and calls. Answer calls, make calls, reject/end calls, etc. by pressing or rotating the button. In addition, it also supports mobile phone voice navigation, which greatly improves the operation process and makes driving safer Colorful atmosphere light music: With 7 kinds of atmosphere lights, more color changes, 7 colors displayed continuously, let you feel the beautiful atmosphere carried by music and lights at the same time, it can also help you watch more easily at night and use the transmitter more Drive safely. Multiple safety protections: built-in overcurrent protection, surge protection, intelligent temperature control, and short circuit protection.