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2 in 1 music car charger iPads & Smartphones

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Introduction & Specifications

We use our phone more in the car. That may sound weird, but I do. I never used Spotify in the car. This device works super easy and has Spotify controls built-in. With the Roidmi 3S, I can charge my device, get the directions, control the music, and transmit the music from Spotify to my car! Amazing! 

Hardware & Design

The size of the Roidmi 3S is something we see more often with car chargers. It is not too big and it is just a simple design. I like the feeling of the Roidmi 3S since it has a bit of extra weight. It gives me that premium feel you looking for in gadgets.Plugging it in is easy.


The Roidmi 3S can charge two devices at the same time and transmit your music to your car stereo. Let’s have a look at the features you must have in your car.



There are two USB ports on the Roidmi 3S. Both give you 5V and 2.4A of power. This means you can not fast charge your device. All the power I gain in my car is a win for me. If I navigate to somewhere and I get out of the car with more power then I started, I’m a happy man!

Roidmi App

You need to download the Roidmi app to use the Roidmi 3S. This application is free for Android and iOS and can be downloaded via the link below. In the app, you need to choose what device you have, so in this case, you will choose the Roidmi 3S. Make sure that the Roidmi 3S is in the car already and you made the Bluetooth connection.

The app will see that the Bluetooth connection is made and now will find, automatically, the best frequency to use. When it found the right frequency, just navigate to that specific frequency on your car radio and you are good to go!

FM Transmitter

Now that the Roidmi app found the best frequency to use, you can start your favorite Spotify playlist. Instead of coming from the smartphone speaker, it will come from the car radio now. I love this and I tried a lot of different products, but they did not work as well as the Roidmi 3S.

Auto Start

The Roidmi 3S has an auto start/connect feature. This means that when you start your car, it will automatically start the Roidmi 3S and make a connection with your smartphone. Now you just have to go to the right frequency and play your playlist.




Models: Roidmi 3S
Input: 12 - 24V
Output: 5V 2.4A (Max 3.4A)
Working Temp.(℃): 10 - 60 Deg.C
Material ( Cable & Adapter): Stainless Steel
Product weight: 0.0320 kg
Package weight: 0.0560 kg
Product size (L x W x H): 6.50 x 2.60 x 2.60 cm / 2.56 x 1.02 x 1.02 inches
Package size (L x W x H): 8.50 x 8.50 x 3.00 cm / 3.35 x 3.35 x 1.18 inches
Package Contents: 1 x Car Charger, 1 x English User Manual