FM transmitter GoodBuy GBTRA31V2BK with USB, MicroSD slot and 3.1A charging

GoodBuy GBTRA31V2BK is an FM transmitter designed for in-car audio streaming and hands-free playback. It supports music playback from USB pendrives and MicroSD cards, connects wirelessly via Bluetooth 3.0 + EDR, and transmits audio to a car radio within the 87.5–108.0 MHz FM band. The device also provides a 3.1A charging output so you can charge mobile devices while using the transmitter. Compact dimensions make it suitable for older vehicles that lack built-in Bluetooth.

Advantages

The transmitter offers multiple playback options (USB and MicroSD) and wireless streaming via Bluetooth with a range up to 5 m. It supports common audio formats MP3 and WMA and accepts memory cards up to 32 GB. The unit combines audio transmission with device charging through a 3.1A output, and its small form factor (8 × 4 cm) is easy to place in a vehicle.

Suitable for

• Adding Bluetooth audio streaming to older cars without Bluetooth
• Playing music from USB pendrives or MicroSD cards while driving
• Charging smartphones and other devices from the car power socket while listening to music

Key specifications

• Frequency response / FM band: 20 Hz – 15 kHz; 87.5 – 108.0 MHz
• Bluetooth version: 3.0 + EDR; range up to 5 m
• Memory support: USB pendrive, MicroSD; maximum storage: 32 GB
• Supported formats: MP3, WMA
• Charging output: 3.1 A (charging current spec: 45 mA at DC12V indicated)
• Dimensions (L × W): 8 × 4 cm

How to use

Plug the GoodBuy GBTRA31V2BK into the car power socket, set an unused FM frequency on your car radio within 87.5–108.0 MHz, and tune the transmitter to the same frequency. Connect a phone via Bluetooth (pairing using Bluetooth 3.0 + EDR) or insert a USB pendrive / MicroSD card containing MP3 or WMA files. Start playback from the chosen source; audio will be transmitted to the car radio. Connect a device to the USB port to charge while using the transmitter.

Usage recommendations

For best reception, choose an FM frequency with minimal local radio interference and keep the Bluetooth source within 5 m of the transmitter. Use properly formatted MP3/WMA files and a MicroSD/USB drive up to 32 GB. Observe vehicle safety rules and avoid adjusting the device while driving.