Specification: Product Name: Colorful Car Bluetooth MP3 Bluetooth version: BT5.0 Support expansion: U disk/TF card ≤64G (not included) Transmitting frequency: 87.5MHZ~108.0MHZ Power supply: DC5V Output current: 3.1A Play mode: FM FM play Display: Frequency LED display Product material: ABS Effective distance: ≤10m Use models: 12V~24V cars can be used Function: Support Bluetooth hands-free call, support MP3/WMA format music, hold USB/TF card/Bluetooth function Highlight description: 1. [Quick Charge 3.1]: 3.1A dual USB smart charging, one 3.1A, one 1A, efficient and fast charging, and quickly charge compatible devices to 80%. 2. [U disk/TF plug and play]: You can play music on the car stereo via Bluetooth/U disk/TF card, Bluetooth hands-free call, one-key operation, advanced noise reduction technology will ensure quality, no stuck Pause, make the sound quality more shocking. 3. [7-color LED optional]: Support 7 colors of LED backlights, including red/green/blue/yellow-green/purple/cyan/orange, with ambient lights in the car, adding mood to the night. 4. [Safety function]: Equipped with multiple protections such as voltage detection function, over power protection, over current protection, short circuit protection, over voltage, etc., it is more assured to use. 5. [Widely compatible]: Adapt to 12V~24V car models, compatible with all kinds of mobile phones, tablets, earphones, MP3 and other devices. Parts List: Bluetooth car charger x1 Manual x1