Feature: 1. LED Light: Colorful LED atmosphere light, independent switch design, can be opened with one button, short press the light button to turn on off the light and adjust the light mode. 2. Bluetooth 5.1: Adopt Bluetooth 5.1 version, lossless audio decoding, high performance stereo, intelligent noise reduction, double tone microphone, hands free calls are clearer. 3. Dual USB Port: The bluetooth car adapter coming with 2 USB ports and Type C port, you can charge three devices simultaneously, PD20W and QC3.0 fast charging. 4. Safe: Carbon fiber style car charger, reinforced anti skid shrapnel, strong shock and bumps don not break charging, real time monitoring battery voltage, safe driving. 5. Power Off Memory: With power off memory playback function, automatic connection after startup, memory frequency, track restart after power failure, and play the song from the beginning when the power is off. 6. Universal Fitment: Car bluetooth MP3 player universal fit for Android and for iPhone, compatible with massive app and suitable for 12v‑24v mainstream models on the market. Specification: Item Type: Car Bluetooth MP3 Player Material: ABS.Input Voltage: 12V-24V Built-in microphone, hands-free calls and A2DP music playback Automatically switches from music to hands-free mode Dual USB OutputUSB Output: QC3.0(5V/3A, 9V/2A, 12V/1.5A) Type-C Output: PD20W (5V/3A, 9V/2.22A, 12V/1.67A) Led Frequency Display With Voice Prompts Support USB Reading Support MP3, WMA, WAV And Other Formats Transmission Frequency: 87.5-108.0MHZ Transmission Distance: < 5m Automobile Battery Voltage Display: Automobile Battery Monitoring Adjustable Colorful Atmosphere Lamp (with Independent Switch) Car Charger Function, With 1 PD Port + 2 USB Ports Support U Disk / Memory Card: ≤ 32GB Automatic Power Off Memory Function Bluetooth Version: 5.1 Bluetooth Effective Distance: 10m With EQ Mega Bass Package List: 1 x Car Bluetooth MP3 Player1 x Chinese English User Manual Note: When adjusting the frequency of car radio, manual FM should be adopted. Adjust the frequency of car radio to blank frequency, and then adjust the transmitting frequency of car Bluetooth MP3 to be consistent with the frequency of car radio, so that the sound quality is best. The cleaner the frequency of car radio is, the better the sound quality is.