# FM transmitter Roidmi 3S — car cigar lighter, USB Type-A, 12–24V to 5V, analog FM, black

**URL:** https://aio.lv/en/product--roidmi-xia-roidmi-3s--482668
**Data updated:** 2026-03-07 10:53 (EET)
**Category:** FM Transmitters
**Manufacturer:** Roidmi
**Manufacturer code:** XIA-ROIDMI-3S
**EAN:** 6970019140117
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 31.99 €
**Prices and availability valid until:** 2026-07-12 23:59
**Price without VAT (21%):** 26.44 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--roidmi-xia-roidmi-3s--482668

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 07.07.2026 | free |
| Pickup points | 10.07.2026 | 1.99 EUR |
| Courier delivery to door | 10.07.2026 | 4.99 EUR |

## Summary description

Roidmi 3S is an in-car FM transmitter that plugs into the cigarette lighter. It features an analog FM tuner, supports FM bands, and provides a USB Type-A output for powering or connecting devices. Designed for 12–24 V DC input and delivering 5 V output, the compact black unit (25×25×53 mm) enables audio streaming and device charging in vehicles.

## Long description

Roidmi 3S is a compact in-car FM transmitter that connects to the vehicle's cigar lighter socket to enable wireless audio streaming and device charging. The unit uses an analog FM tuner to broadcast audio from a connected source to the car radio and provides a USB Type-A port delivering 5 V output for powering or charging mobile devices. Designed for 12–24 V DC vehicle electrical systems, the black Roidmi 3S measures 25×25×53 mm and combines audio transmission and a convenient power outlet in a single compact device.
Advantages
The Roidmi 3S integrates an analog FM transmitter and a USB Type-A power output in a compact housing suitable for most vehicles with a cigar lighter socket. Its 12–24 V input range makes it compatible with cars, vans and trucks that use automotive DC power, while the 5 V USB output supports charging or powering smartphones and accessories. The simple plug-in design and small dimensions make installation and storage unobtrusive, and the analog FM tuner allows straightforward pairing with the car radio without relying on vehicle-specific interfaces.
Suitable for
Streaming audio from a phone, MP3 player or other audio source to a car radio via FM transmission
Charging or powering mobile devices and accessories using the USB Type-A port
Use in vehicles with a 12–24 V cigar lighter socket such as cars, vans and light trucks
Key specifications
Input voltage: 12–24 V DC suitable for standard automotive electrical systems
Output: USB Type-A delivering 5 V for device charging/power
Audio transmission: analog FM tuner for broadcasting to car radio
Device interface: plugs into cigar lighter socket
Colour: black
Dimensions: 25 × 25 × 53 mm (compact form factor)
How to use
Insert the Roidmi 3S into the vehicle's cigar lighter socket to provide power. Set your car radio to an unused FM frequency, then tune the transmitter's analog FM tuner to the same frequency. Connect an audio source or a device to the transmitter and use the car radio to receive the broadcasted audio. Use the USB Type-A port on the transmitter to charge or power a mobile device while driving. Adjust the car radio volume and the source device's output level for optimal audio clarity.
Usage recommendations
For best audio quality, choose an FM frequency with minimal local radio interference and position the source device to maintain a stable connection. Verify the vehicle electrical system voltage compatibility before use and ensure the USB output power requirements match the connected device.

## Specifications

### Storage

| Feature | Value |
|---|---|
| Card reader integrated | No |

### Operational conditions

| Feature | Value |
|---|---|
| Operating temperature (T-T) | 10 - 60 |

### Power

| Feature | Value |
|---|---|
| Output voltage | 5 |
| Power source type | Cigar lighter |
| DC input voltage | 12 - 24 |
| Port 1 output current | 2.4 A |
| Port 2 output current | 2.4 A |

### Ports & interfaces

| Feature | Value |
|---|---|
| USB connector type | USB Type-A |
| USB 2.0 ports quantity | 2 |
| Device interface | Cigar lighter |

### Radio

| Feature | Value |
|---|---|
| Tuner type | Analog |
| Supported radio bands | FM |

### Technical details

| Feature | Value |
|---|---|
| Product colour | Black |
| Apple docking | No |

### Clock

| Feature | Value |
|---|---|
| Integrated clock | No |

### Display

| Feature | Value |
|---|---|
| Built-in display | No |

### Weight & dimensions

| Feature | Value |
|---|---|
| Height | 53 mm |
| Width | 25 mm |
| Depth | 25 mm |

## FAQ

### How much does the Roidmi 3S FM transmitter for car — USB Type-A cost, and is it available for purchase?

The price is 31.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 3 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 07.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Roidmi products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Roidmi service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

### How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: device interface, product colour, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

## Image

https://aio.lv/img/cache/product/482668/53800346_large.webp