Bass Boosted Hi-Fi Stereo car bluetooth fm transmitter simply click "b" to activate the BASS sound effect with one click. At the same time, it also uses high-quality Hifi technology to restore the sound real and heavy bass, bringing the ultimate listening experience. Dual Microphone Hands-Free CallingThis car bluetooth adapter features an upgraded dual-microphone design and is equipped with CVC noise reduction technology and echo cancellation. You can connect, hang up and reject calls, giving you a better hands-free calling experience. 48W Fast ChargingThis bluetooth cigarette lighter is equipped with 30W PD3.0 fast charging ports and 18W QC3.0, which can quickly charge two devices at the same time, compatible with Samsung/iPhone/Xiaomi/Google and other fast charging protocols. Bluetooth 5.3 U diskThis transmitter car bluetooth uses an upgraded Bluetooth 5.3 chip, which makes the transmission faster, more stable and safer. To a large extent, problems such as transmission delay and connection are avoided. Provide Bluetooth and U disk two playback methods. LED Light Bar LED DisplayThis bluetooth hands-free car kit has a 7-color LED light bar, making it easy to quickly find the transmitter when driving at night (lights can be turned off). At the same time, it is also equipped with LED indicators, which can automatically detect the voltage when starting. Safer Widely UsedJOYROOM bluetooth car cigarette lighter is equipped with multiple protections such as overcurrent , surges, overheating and short circuits, ensuring safe charging during travel. The frequency range is 87.5 MHz to 108 MHz, and it will automatically connect to the registered Bluetooth device after booting. Compatible with 12V-24V cigarette lighters and 99% of smartphones.