3 charging interfaces and PD3.0 fast charging: Bluetooth FM transmitter with Type-C port PD3.0, the PD supports a 18 W quick charging function. The charging speed is 70% faster than normal. 2 USB charging ports: PD/18W, 5V/2.4A, 5V/2.4A Max (U HDD connection). It can charge 3 devices at the same time, pretty practical. Deep bass music and HD sound quality: the bass design, just press the bass button "EQ", you can enjoy the deep bass music in your car if you want what makes you more comfortable when you drive. 3 music playback modes, via Bluetooth, U disk (max. 32 G), Micro SD card (max. 32G), HD sound quality, the journey is no longer boring. 7 colour backlight and 1.4 inch LED screen display: with 7 colours guided background light, including red, green, blue, yellow, purple, cyan, white, long press the "light" button so that the 7 colours are displayed alternately. Plus 1.4 inch LED screen display, generates great visual effects, very convenient to watch. Hands-free with microphone: Supports A2DP, excellent built-in microphone with noise reduction (CVC) technology, available to make clear calls, ensure driving safety. Supports answering / hang up / rejecting / redialling calls; long press "hands-free" button to activate Siri / Google voice assistant. Bluetooth V5.0 connection: it has a Bluetooth V5.0, also compatible with V1.2 / 2.0 / 2.1 / V3.0 / 4.0 / V4.1 / V4.2, provides a more stable connection. Specifications: FM tuning range: 87.5 ~ 108 MHz. Support audio format: MP3 / WMA / WAV / FLAC. Supports Bluetooth protocol: A2DP / AVRCP / HFP / HSP. USB 1: Supports PD3.0 fast charge (max. 18 W). USB 2: 5 V / 2.4 A. USB 3: 5 V / 2.4 A. Types of music playback: U disk (max. 32 G) / Micro SD card (max. 32G) / Bluetooth. Wonderful deep bass music ("EQ" button). It is so pleasant to enjoy your favourite music, especially listening to the car music of the deep bass while driving, which is so cool and exciting. This Bluetooth FM transmitter can help achieve the deep bass, effect, stimulate your nerves. Loved car with cool music, help you have more pleasure in driving. Auto voltage monitoring:Automatic detection of the vehicle voltage, and displayed on the LED screen, help you know the voltage status of the car. Under 12 V: Danger voltage range, the battery must be replaced. Hands-free with microphone:Supports A2DP, excellent built-in microphone with noise cancellation (CVC) technology, available to make clear calls, ensure driving safety. Support for answering/hang up/reject/redial calls.