BT618C Vehicle Bluetooth MP3 Player FM Transmitter for car use, wholesale car audio adapter with 118x40x35mm dimensions, USB 2.1A charging, 3.5mm audio output and support for MP3/WMA files up to 8GB memory capacity
BT618C Vehicle Bluetooth FM Transmitter and MP3 Player with 8GB Memory Support and 118mm Compact Design

This BT618C Bluetooth FM transmitter bridges the gap between modern mobile devices and older car audio systems that lack integrated Bluetooth connectivity. By combining wireless Bluetooth streaming with FM transmission technology, it allows you to play music from your smartphone or tablet through your car's existing stereo speakers without costly upgrades or complex wiring installations. The device also functions as a standalone MP3 player with support for memory cards up to 8GB capacity, providing multiple options for audio playback during your journeys. With its compact 118x40x35mm dimensions and 46-gram weight, it occupies minimal space on your dashboard or centre console while offering practical audio connectivity solutions for most vehicles.
Features and Construction

The BT618C incorporates several key technologies that work together to deliver audio to your car stereo system. Its primary function is as a Bluetooth receiver that pairs with mobile devices, then transmits that audio signal via FM radio waves to your car's radio tuner. This dual-function approach makes it compatible with virtually any vehicle equipped with a standard FM radio, regardless of the car's age or original audio system specifications.
Material and Build
The device utilises a plastic housing that contributes to its lightweight 46-gram construction, making it suitable for portable use between vehicles if needed. Internal electronic components include a Bluetooth module for wireless connectivity, an FM transmitter circuit operating within the 87.5-108.0 MHz frequency range, and processing circuitry that supports MP3 and WMA audio file formats. The 128x64 pixel dot matrix LCD screen provides clear display of track information, settings, and connection status without consuming excessive power, with the device operating at 60-70mA working current.
Size and Practical Fit
With dimensions measuring 118mm in length, 40mm in width, and 35mm in height, the BT618C maintains a compact footprint that fits comfortably in most vehicle power outlet locations without obstructing other controls or storage areas. The 46-gram weight ensures it remains securely positioned once plugged into the 12V/24V DC socket, reducing the likelihood of disconnection during vehicle movement. This practical sizing makes it suitable for use in cars, vans, and lorries where dashboard space may be limited but audio connectivity is desired.
Uses and Placement

The BT618C serves multiple roles in vehicle audio systems, primarily functioning as a bridge between modern Bluetooth-enabled devices and traditional car stereos. Its applications extend from personal entertainment during daily commutes to providing background music for delivery drivers or tradespeople who spend extended periods in their vehicles. The device's compatibility with 12V-24V DC vehicle electrical systems ensures it can be used in cars, light commercial vehicles, and some larger vehicles without modification.
Event or Professional Use
For professional drivers, delivery personnel, or tradespeople who use their vehicles as mobile offices, the BT618C offers a practical audio solution that doesn't require permanent installation or vehicle modification. The ability to stream audio wirelessly from smartphones means hands-free operation is maintained for safety, while the FM transmission method ensures compatibility with virtually any vehicle radio system encountered in fleet operations. The device's working temperature range of 0°C to 60°C makes it suitable for use in various climate conditions throughout the year.
Everyday Home Use
For daily commuters and family drivers, the BT618C simplifies the process of playing personalised music, podcasts, or audiobooks during regular journeys. The Bluetooth connectivity with a 5-metre range allows passengers to control audio playback from anywhere in the vehicle, while the MP3 player functionality with 8GB memory card support means music is available even without a mobile data connection. The USB 2.1A charging port provides simultaneous device charging during playback, ensuring smartphones and tablets remain powered for navigation and communication functions.
Benefits and Buying Value
The BT618C represents a cost-effective approach to adding modern audio connectivity to vehicles without integrated Bluetooth systems. By avoiding the expense of replacing factory-installed stereos or commissioning professional installations, it delivers functionality that enhances the in-vehicle experience while maintaining the original equipment. The device's multiple connection methods - Bluetooth wireless, memory card playback, and 3.5mm auxiliary input - provide flexibility that accommodates different user preferences and technology availability.
Reuse and Low Maintenance
With no moving mechanical parts and solid-state electronic construction, the BT618C requires minimal maintenance beyond occasional cleaning of the plastic housing. The device can be easily transferred between vehicles by simply unplugging it from one 12V/24V DC socket and inserting it into another, making it suitable for households with multiple cars or for use in rental vehicles during travel. This reusability extends the value proposition beyond single-vehicle application, particularly for users who upgrade their primary vehicle but wish to retain their audio connectivity solution.
Why Choose This Product
The BT618C offers specific advantages for users seeking to add Bluetooth audio to their vehicles without modifying existing systems. Its comprehensive specification includes support for memory cards up to 8GB capacity, USB 2.1A charging capability, and both wireless and wired connection options. The 128x64 pixel LCD screen provides clear feedback without being overly complex, while the FM transmission method ensures compatibility with the broadest range of vehicle radios. For drivers with older cars or those who prefer not to invest in integrated Bluetooth systems, this device provides a practical intermediary solution that balances functionality with simplicity of use.