Plug FM Transmitter into the cigarette lighter, set the Transmitter and your car FM system at a same frequency, connect your device to the FM Transmitter via Bluetooth/Audio line, and then you can enjoy your time Featuring a QC3.0 charging port to deliver high speed charging to driver and passenger Two installation methods with firmly, bluetooth MP3 player can hold the air outlet or stick on the dashboard Except the Bluetooth connection, FM audio adapter can also play music through the TF card (card not included) Designed with colorful LED backlit Built-in microphone feature can provide you hands-free talking and wonderful tone quality Specifications: Bluetooth Version: V5.0 + EDR Rated Working Voltage: 12V-24V Limiting Working Voltage: 10-26V Bluetooth Sound Processing: A2DP, AVRCP, HFP, HSP Effective Distance of Bluetooth Microphone: 0.5-2M Bluetooth Transmission Distance: 10M Music Formats: MP3, WMA, FLAC, WAV FM Transmitting Frequency: 87.5-108.0MHz Output Current: QC3.0 + Type-C PD18W Working Temperature: 0 Celsius degree ~ 50 Celsius degree Signal to Noise Ratio: 60db Package included: 1 x Bluetooth Car FM Transmitter Audio Adapter Receiver PD QC3.0 Bluetooth Car Adapter Colorful LED Backlit 1 x English and Chinese Manual