# Rock B301 FM Transmitter with Bluetooth, 2xUSB, USB-C, and microSD Support, 36W

**URL:** https://aio.lv/en/product--rock-6941402706036--12495154
**Data updated:** 2026-06-04 18:14 (EEST)
**Category:** FM Transmitters
**Manufacturer:** Rock
**Manufacturer code:** 6941402706036
**EAN:** 6941402706036
**Warranty:** 2 Years
**Availability:** Out of stock

## Summary description

The Rock B301 is a versatile FM transmitter designed for seamless audio streaming and device charging in your vehicle. It features Bluetooth connectivity, two USB ports, a USB-C port, and a microSD card slot for flexible playback options. With a total power output of 36W, it ensures efficient charging for your mobile devices while you enjoy your favorite music through your car's audio system.

## Long description

The Rock B301 FM transmitter is a multifunctional car accessory designed to bridge the gap between modern mobile devices and older vehicle audio systems. By converting digital audio signals into FM radio frequencies, it allows you to stream music from your smartphone or storage media directly through your car speakers. Beyond its audio capabilities, the device serves as a high-performance charging hub, ensuring your electronics remain powered during long journeys.
Advantages
This transmitter stands out due to its comprehensive connectivity options, which include Bluetooth for wireless streaming and a microSD card slot for direct playback of stored audio files. The integrated charging system is highly efficient, offering a total power output of 36W across multiple ports. This allows users to charge several devices simultaneously without compromising speed or stability. The compact design ensures it fits neatly into the cigarette lighter socket without obstructing vehicle controls, while the intuitive interface makes switching between music sources and managing calls straightforward.
Suitable for
Streaming music wirelessly from smartphones via Bluetooth
Playing audio files directly from microSD cards
Fast charging mobile phones and tablets while driving
Adding Bluetooth functionality to vehicles lacking built-in wireless audio
This device may not be suitable for vehicles that do not have an FM radio receiver or for users who require high-fidelity audio transmission, as FM signals can occasionally be subject to interference from local radio stations. It is also not intended for use in vehicles where the cigarette lighter socket is positioned in a way that prevents the transmitter from maintaining a stable connection.
Key specifications
Total power output: 36W
Connectivity: Bluetooth, 2x USB-A, 1x USB-C
Media support: microSD card slot
Compatibility: Standard vehicle cigarette lighter sockets
To use the Rock B301, plug the device into your car's cigarette lighter socket and tune your car radio to an empty FM frequency. Match the frequency on the transmitter display to the one set on your radio. Once connected, pair your smartphone via Bluetooth or insert a microSD card to begin playback. You can then use the device's interface to control volume, track selection, and call management.
What to consider before purchase
Check if your car radio has a clear, unused FM frequency available in your area
Verify that your vehicle's cigarette lighter socket provides consistent power
Ensure your charging cables are compatible with USB-A or USB-C ports
For the best audio quality, always select an FM frequency that is completely free of local radio station broadcasts to minimize static and interference.

## FAQ

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer. 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 Rock 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 Rock 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

## Image

https://aio.lv/img/cache/product/12495154/68827482_large.webp