FM transmitter SENCOR SWM3535BT with Bluetooth V4.2, USB, TF card support, DC 12/24V, 87.5–108 MHz

Portable FM transmitter SENCOR SWM3535BT provides wireless audio streaming via Bluetooth and plays MP3, WMA, FLAC and WAV files from USB flash drives or a TF/microSD card. Designed for use in cars, it transmits audio to the vehicle radio and supports hands-free calling through the built-in microphone and call-answering via the car stereo. The unit also includes two USB slots (one for music playback, one for charging), a yellow non-shining LED display and a digital frequency tuner with memory for last frequency, track number and volume.

Advantages

The SENCOR SWM3535BT supports Bluetooth 4.2 for stable wireless connection and includes dual USB ports to separate music playback and charging. It accepts TF/microSD cards up to 32 GB and plays common audio formats (MP3, WMA, FLAC, WAV). The device offers hands-free calling with an integrated microphone, simple playback controls (pause, previous/next) and a voltage meter to monitor the car power supply. Its compact dimensions (38 x 70 x 48 mm) and lightweight construction (27 g) make it easy to install and store in the vehicle.

Suitable for

• Playing music from smartphones via Bluetooth
• Playback of MP3/WMA/FLAC/WAV files from USB flash drives
• Playback from TF / microSD cards (up to 32 GB)
• Hands-free phone calls through the car stereo
• Charging mobile devices from the car (DC 5 V / 2.4 A max.)

Key specifications

• Model: SENCOR SWM3535BT
• Supported formats: MP3, WMA, FLAC, WAV
• Connectivity: Bluetooth 4.2, USB, TF/microSD card slot (up to 32 GB)
• USB slots: 2 (one for music playback, one main for charging)
• FM transmitting range: 87.5–108 MHz; number of frequencies: 206
• Power: DC 12/24 V (car power plug); USB charging output DC 5 V / 2.4 A max.
• Controls: volume, pause, previous/next, digital tuning and frequency display
• Additional features: wireless hands-free, call answering via car stereo, microphone, memory of last frequency/track/volume, voltage meter
• Display: yellow non-shining LED
• Dimensions (W×H×D): 38 × 70 × 48 mm; Weight: 27 g

How to use

Plug the FM transmitter into the vehicle 12/24 V power socket. Select an unused FM frequency on the transmitter using the digital tuner and tune the car radio to the same frequency. Connect your smartphone via Bluetooth 4.2 or insert a USB flash drive (MP3 slot) or TF/microSD card to play stored audio files. Use the device buttons to control volume, pause and track selection. For hands-free calls, answer calls through the car stereo; the built-in microphone will handle voice transmission. Use the main USB port to charge another device while audio playback runs from the designated music USB or TF card.

Usage recommendations

Choose an FM frequency with minimal interference for best audio quality and keep the transmitter and smartphone within typical cabin range to maintain a stable Bluetooth connection. Do not exceed the specified USB charging current (DC 5 V / 2.4 A) for connected devices.