1. This product is a car-specific Bluetooth hands-free car charger MP3 player. 2. Using high-performance professional-grade Bluetooth 4.2 chip 3. You can use your Bluetooth connection to transmit MP3 music from your phone to your car stereo via wireless transmission 4. You can also use hands-free calling 5. You don't need to modify your car to make it easy for you to enjoy the music while you're on the road. 6. Bluetooth 4.2+EDR version, support operation voice prompts, support call number 7.Intelligent recognition of all types of Android and IOS mobile phones and other devices, USB charging support 2.0 fast charge.USB 1:2.1A fast charging,USB2:1A charging/support usb disk playing. 8. Support FM full-frequency point emission 9. MP3/WMA/WAV/APE/FLAC music format, support automatic power off memory function 10. Bluetooth stereo A2DP music playback Specifications: USB interface: high speed USB2.0 Screen: LED screen Support U disk capacity: ≤32GB (U disk not included) Power supply: DC12V-24V Supported file types: MP3/WMA/FLAC/WAV/APE Operating Current: 45mA DC12V Bit rate: 64-320 kbps FM frequency range: 87.5-107MHz (100KHz stepping) Signal to noise ratio: 85dB (FM: 65dB) Harmonic distortion: <0.05% (FM <0.1%) Working temperature: 0°C-60°C Launch distance: <5 meters Item Size: 5.2*8.1*4.6cm Model Name: Handsfree Car Kit Out Power: 2.1A + 1A Special Features: Dual USB Car charger FM transmitter Voltage: 12V Origin: Mainland China Certification: None Material: ABS Item Type: FM Transmitters/Car charger adapter Features 1: Bluetooth Car MP3 player Features 2: FM transmitter Bluetooth car kit Features 3: Bluetooth Hansfree calling Package includes: 1x Car Fm Transmitter Modulator Notice: 1.the item comes without the retail packing box because it will increase the shipping fee for you,but do not worry,we will pack it well before sending. 2.Please feel free to leave a message to us before you give the bad feedback, if the products have some problems,we will try our best to solve it well for you. Thanks for your understandings.