T20 Bluetooth V3.0 Wireless FM Transmitter Dual USB Car Charger Hands-free Car Kit Support TF Card/U-Disk MP3 Music Player

• Two USB ports allow charging two devices at a time, fast charging does not hurt phones
• You can stream music on your car stereo via Bluetooth/U-disk/TF card, as while wonderful stereo sound delivered via the vehicle's speaker  
• Plug the car charger into your car cigarette lighter socket with no more extra wires, easy to use
• Bluetooth hands-free function, built-in microphone, your driving trip will be safer and cozier
• Memory function,  automatically connect after booting once paired

Specification: 

• Bluetooth version: V3.0
• Voltage: 5V +/- 0.5
• Working current: 45ma(max) 
• Stand-by current: 25ma(max) 
• Frequency: 2.402~2.480Ghz
• Sensitivity: -92dBm
• Rf output: 4dBm
• FM frequencies: 87.5MHz-108MHz
• Effective range: 5m
• Certification: CE