Tewtross Bluetooth FM Transmitter Hands Free Car Kit with Dual USB Charger Say Good Bye To The Messy Wires & Other Hassels In Your Car For Enjoying Your Music Or Taking Calls Just Plug, Tune, Pair & Play With Pure Crystal Clear Sound From Your Car Speakers.Pairs With Almost Any Bluetooth Enabled Mobile Or Tablet How To Use?  1.Turn On The Car Fm Radio. 2. Plug The Transmitter In The Car Charger Port Of Your Car And Keep The Fm Transmitter & Your Car Fm Radio At The Same Station. 3. For Best Use, Tune The Frequency To An Unused Empty Station (Fm Frequency: 87.5Mhz - 108.0Mhz) 4. Now Pair The Bluetooth Fm Transmitter With Your Phone. 5. Connect Without Any Password (Please Put Code 0000 If Required)Tips: Adjust Your Transmitter And Car Radio To The Same Fm Station To Avoid Any Disturbance.  To Make Sure The Perfect Sound, Adjust The Sound Volume Of Your Phone Or FM Transmitter Rather Than Turning The Car Speaker To Full Volume. Press And Hold The Multifunction Button 8-10 Seconds, Switch Voice Prompts Language  Amazing & Crisp Sound Reception Enjoy The Crisp & Clear Call & Music Sound From Your Car Speakers Good Display The Transmitter Comes With A Pretty Handy Display That Display The Number Of Your Incoming Call,So That You Dont Have To Reach Out To Your Phone To Check Who'S Calling ? Flexibility And Convenience The Flexible Neck Can Be Adjusted To The Perfect Viewing Angle For Convenient Use.Memory Function Makes Auto-Connect To The Last Paired Phone Possible. Safe Driving Flexible Neck With Rotated Button And Softer Indicator Light Provides Better Driving Experience. Fast Charging: It Allows 2.1 A Output (Max). A 5V/2.1A Usb Charging Port Offers Fast Charging, Ensuring You Have A Wonderful Time During Driving