Specifications Brand : LENCENT Model : C81 Bluetooth Version: V5.1 QC port output : 18W PD port output : 20W Input Voltage : DC 12-24V QC port output current: 5V / 3A 9V / 2A 12V / 1.5A PD port output current: 5V / 3A 9V / 2A 12V / 1.5A Music format: MP3, WMA, WAV, FLAC Packing Size: 10.5* 6.5*4.5 cm Weight: 72g Product Description 38W PD +QC Fast Charging The car adapters can fast charge two devices simultaneously via PD 20W and QC3.0 18W port (38W total), 4X faster than standard chargers. Advanced Bluetooth 5.1 Technology Built-in Bluetooth 5.1 chip provides a more stable connection for streaming music over FM frequency and making hands-free calls, allowing for faster pairing with compatible devices, built-in microphone, supporting smart voice navigation from your phone, streaming the audio from navigation app/Siri/Google Assistant to your car. Strong Dynamic Hi-Fi bass boost Exclusive bass key-press juicing up the stereo effect makes this device stand out, which offers you crystal-clear sound while you are enjoying the long ride with your beloved ones. Answer Calls Hands-free Press only one button, you can take a hands-free phone call easily and safely. CVC noise cancellation can reduce background noises and offer clearer hands-free calling to ensure safer and more reassuring driving. Wide Compatibility & Exclusive Lifetime Warranty Service Fit most devices that support Bluetooth function(such as iphone, ipad, ipod, tablet, samsung, htc, sony and other andriod smartphones.), and all vehicle type including car, van and truck(12-24V). We provide warranty and lifetime support. WHAT YOU GET:LENCENT Bluetooth radio transmitter for car*1, User Guide*1. WE CARE FOR YOU:This item comes with friendly customer solution. Please email the LENCENT FM Transmitter Office Store first for a solution if meeting any connect issue or using problems , we will be sure to provide a satisfying solution for you. Warm Tips for avoiding FREQUENCY STATIC NOISE 1. Find A Blank Frequency: Please note that you should set your car radio to the mode of Manual Search. Then tune the car FM radio to a blank frequency. Any station is fine as long as it is not in used (no broadcast). 2. Pair Frequency: Make sure the channel on the transmitter and the channel on the radio are the same. 3. Adjust Volume: If you feel the sound is low, please increase the volume of your phone. You can set your phone volume to maximum. But the volume of the car speaker is suggested at 40% (never exceed 60%). The transmitter usually 60% is enough(never exceed 80%). It is not recommended to adjust volume of your car speaker to maximum (this might cause noise). ADJUST STEPS: PhoneFM TransmitterCar Speaker Bluetooth 5.1 BT 5.1 are considered better than 5.0 and 4.2, make sure our connection positioned conveniently enough to work effectively. Voice Navigation You can get clear voice navigation from the phone app. The volume for navigation will be adjusted automatically while playing music. No more hassle, but full of exploration on your journey. Monitor Car Voltage It is equipped with a voltmeter to show you the condition of your car battery. Voltage should be between 13. 2V to 14. 7V when your car is on and moving. 12. 2V to 12. 8V when your car is parked and ignition is off. Easy to Install: Step 1 Step 1- Tune the car FM radio to a blank frequency. Any station is fine as long as it is not in used (no broadcast). Step 2 Step 2- Press the CH button, the LED display will show the frequency number of the transmitter. Step 3 Step 3- Rotating the metal rotatory knob to change its frequency and set it to the one same as your car FM radio. Step 4 Step 4- Pair FM Transmitter with your phone"'"s bluetoothC81.