Feature 1、Answer calls hands‑free design, high‑performance microphone with noise suppression cvc technology, grants you clear call, answering/redialing/dismissing or ending the call just simply click a button. 2、The bluetooth transmitter supports voice navigation of your phone. meanwhile, power off or power on, just slightly rotate the phone button, making drive more safe. 3、It can also support your playlist with no distortions of the original signal from your mp3 smartphones and more bluetooth enabled devices. 4、Support for Siri/for Google voice assistant, Support stereo FM Transmitter, Support power off memory function, Support bluetooth reconnect automatic, bluetooth support A2DP, AVRCP, HFP, HSP. 5、Support private answer, Support bluetooth stereo music DSP technology,seamlessly switches between incoming calls and music, and support one key to turn off FM Transmitter, retain charging function. 6、Support bluetooth V5.0, dual LED Display, battery voltage real‑time detection and display, Support QC3.0 (QC 18W), PD3.0(PD 18W). Item Type: Car Transmitter Material: ABS Rated Working Voltage: 12V-24V Limit Working Voltage: 10-26V Blue USB Interface: No Orange USB Interface: QC3.0(MAX 18W) Type-C Interface: PD3.0(MAX 18W) Working Temp: 0-50℃ SNR: >60dB Battery Voltage Error: ±0.5V Bluetooth Version: Version 5.0 Bluetooth Audio Processing: DSP and A2DP (Advance Audio Distribution Profile) Bluetooth Transmission Distance: Approx.10m/10.94yd MIC Effective Distance: Approx.0.5-2m/0.55-2.19yd FM Transmitting Frequency: 87.5-108Mhz FM Transmitting Range: 3m/3.28yd and above FM Transmission Mode: Stereo digital PLL lock frequency How to Use: 1. Check whether the voltage is 12-24V 2. Check the cigarette lighter socket 3. It can be used by inserting to the cigarette lighter Package List 1 x Host 1 x Manual Note The product does not support USB flash drive to play music.