Advanced V5.1 Bluetooth: The Esky FM Transmitter provides you with a clear and consistent signal with its cutting-edge V5.1 Bluetooth technology. You can count on the Esky FM Transmitter to provide you with a faster connection, quicker pairing, and stable signal for up to 10 meters. This transmitter supports intelligent voice navigation, hands-free calling, and music playback. | Auto & Manual FM: Do you prefer auto frequency tuning or manual? Don't worry, the Esky FM Transmitter provides you with both options. Unlike most traditional FM transmitters, our wireless Bluetooth transmitter boasts a fabulous auto-searching function that allows you to receive the best available frequency in a few seconds! Simply press the "Auto" button and the transmitter will do the rest for you. It is convenient in every way! | 38W PD & QC 3.0 Quick Charging: Thanks to the quick charge QC3.0 (18W) and Type-C PD (20 W) charging ports, you can keep 2 devices juiced at the same time and in no time! These charging options are 80% faster than traditional charging options, therefore, providing you with the ultimate convenience of ultra-fast changing. | Hands-free Calling & Siri / Google Voice Assistant: Esky Auto FM Transmitter employs high-fidelity stereo transmission, noise reduction technology, and supports Siri / Google voice assistant. You can count on enjoying a crisp, clear music experience, and phone call. With this device, you can effortlessly get weather updates, news, and navigational information. Simply press and hold the "Phone" button to activate the voice assistant and you are ready to explore! | Expect More: It works with any 12-24V car cigarette lighter socket, and features a blue back-light, and an aluminum adjustment knob for extreme convenience while driving. To ensure total safety during use, this device comes with voltage and current surge protection, as well as, short circuit protection. You can be sure of your car and the transmitter's safety during use. The unique heat dissipation hole prevents overheating and keeps the device cool!