Advanced Bluetooth 5.3 Technology: RM170 FM transmitter built-in advanced Bluetooth 5.3 chip provides a more faster pairing with compatible devices and stable connection, built-in microphone supporting smart voice navigation, hands-free calling & MP3 player from your phone. | Super Fast Dual Charging: RM170 Bluetooth transmitter provides 2 of 20W PD ports for fast charge, this car transmitter can charge two devices at the same time, output 5V 3A/9V 2.22A/12V 1.67A max, compatible with Samsung, iPhone, Google, smartwatches or tablets from 0 to 50% half an hour. | Hi-Fi Music: RM170 Bluetooth car adapter Bluetooth 5.3 provides stable connection, without distorted for Hi-Fi stereo music via Bluetooth. This Bluetooth car adapter allows you to stream lossless music from any Bluetooth-enabled device. | Wider Wireless Reciever Range: RM170 wireless FM transmitter radio reciever provides wider range from 87.5MHz to 108 MHz, you can get more stable and consequent music experience without interference. This Bluetooth car adapter fits most devices that support Bluetooth function, and all vehicle type including car, van and truck(12-24V). | Hands-Free Calling: Built-in microphones supporting smart voice navigation, one key release your hands, answer and reject calls during driving, and noise suppression (CVC) tech can greatly pick up your voice during driving, and effectively reduce noise, let you achieve a satisfactory handsfree call experience. | Intelligent: Auto-connect, our Bluetooth adapter can auto-connect the last connected phone when turned on next time, and activate phone voice control like Siri, Bixby, Google Assistant, etc. | Charge Protection: Display car voltage while plug in. Built-in over-current protection, over-voltage protection, short circuit protection, intelligent temperature control, effectively prevents multiple problems. | LED Backlight: RM170 car transmitter provides 9 light color modes: Rainbow, Breathing rainbow, Red, Green, Blue, Yellow, Purple, Cyan, White, light switch design of the outer circle creates new atmosphere to the car interior space. At the same time, the lighting design is also for you to drive more safely at night. | Quality: RM170 Bluetooth car transmitter transmit the music/navigation of your Bluetooth enabled phone to car stereo via FM signal, this transmitter allows you to use voice navigation, hands-free phone, enjoy high-quality music, charge quickly and have a beautiful journey while driving. | Service: Our professional after-sales customer service will answer your questions online 24 hours a day. If you do not understand the goods, please contact us at the first time. We will patiently help you solve the problems and let you have a happy and satisfied shopping.