FM transmitter SWISSTEN 20114031 with Bluetooth, 2x USB and USB-C input

The SWISSTEN RGB FM Transmitter (model 20114031) provides Bluetooth 5.3 wireless audio streaming to your car radio and adds device charging via USB-C and USB-A ports. It supports MP3/WAV playback from USB flash drives, features adjustable RGB lighting with an LED display, and includes an integrated microphone for hands-free calls. Safety protections guard against short circuits, overcharging, overheating and low car battery voltage. Compact dimensions and broad compatibility make it suitable for adding wireless playback and fast charging to vehicles without built-in Bluetooth.

Advantages

Bluetooth 5.3 ensures a stable connection and up to 5 m effective range for streaming and calls. Dual charging outputs (USB-C and USB-A) each provide up to 5.0V/3.1A (max 15.5W) for fast charging; when multiple devices are connected the available power is shared. Adjustable RGB lighting can be enabled or switched off to suit the car interior. The transmitter supports MP3 and WAV playback from connected USB flash drives up to 128 GB and offers voice assistant compatibility with Siri, Alexa and Google Assistant. Built-in safety protections and a multifunctional control button simplify everyday use.

Suitable for

• Adding Bluetooth audio streaming to cars without factory Bluetooth
• Hands-free phone calls via the integrated microphone
• Charging smartphones, tablets and other USB-powered devices on the go
• Playing MP3/WAV files from USB flash drives

Key specifications

• Model: SWISSTEN 20114031
• Input voltage: 12.0V–24.0V
• Input current: 3.1A
• Bluetooth version: 5.3; protocols: AVRCP, HFP; range: 5 m
• Audio formats: MP3, WAV
• USB-A flash drive support: yes, up to 128 GB
• Outputs: USB-C 5.0V DC 3.1A (max 15.5W); USB-A 5.0V DC 3.1A (max 15.5W)
• Safety protections: short circuit, overcharging, overheating, low car battery capacity
• Lighting: RGB adjustable, switchable; display: LED
• Microphone: integrated (effective range 0.5–2 m)
• Frequency range (FM): 87.5–108 MHz
• Dimensions: 84 x 46 x 39 mm; weight: 29 g
• Operating temperature: -20 °C to 55 °C; humidity: 10%–85%

How to use

Plug the transmitter into the vehicle 12 V/24 V socket, select an unused FM frequency on your car radio within 87.5–108 MHz and match the transmitter’s frequency. Pair your phone via Bluetooth 5.3 and use the multifunction button to play audio, answer calls or control playback. Insert a USB flash drive to play MP3/WAV files directly. Connect devices to USB-C or USB-A ports for charging; note that total available power (15.5W) will be shared when multiple devices are charging simultaneously.

Usage recommendations

For best performance, choose an FM frequency with minimal interference and keep the paired device within 5 m of the transmitter. Disable RGB lighting if you prefer reduced distraction while driving. Avoid exceeding the recommended operating temperature range and ensure secure seating in the vehicle socket to maintain stable connections and charging.