
The Nulaxy KM18 FM Transmitter, is a budget friendly in car FM transmitter and Bluetooth adapter that allows you to stream music and make hands free calls through your car’s audio system.
The basic premise is that the Nulaxy KM18 is designed to plug into a car’s cigarette lighter, making it suitable for older vehicles without Bluetooth capabilities. It has a digital dsplay, and some pretty intuitive controls compared to it’s rivals, which is why we recommend the KM18 over the competition, as they’re well known at this point for balancing cost and functionality.
Model Number: KM18
Bluetooth Version: Bluetooth 5.0
FM Frequency Range: 87.5 – 108.0 MHz
Bluetooth Protocol: A2DP, AVRCP, HFP, HSP
USB Charging Port(s): 1 USB (5V/2.4A)
Micro SD Card Slot: Yes, supports up to 32GB
Supported Audio Formats: MP3, WMA, WAV, FLAC
Input Voltage: 12-24V DC
Screen: 1.44 inch LCD display
Material: ABS
Dimensions: 3.1 x 2.0 x 1.3 inches
Weight: 2.4 ounces
The Nulaxy KM18 offers an array of features that make it appealing to a wide range of people.
Let’s take a closer look at the primary functionalities that set it apart.
The Nulaxy KM18 uses Bluetooth 5.0. This means you’ll get a better connection, faster data transfer rates, and improved range compared to previous versions like Bluetooth 4.2, or 3.0.
With Bluetooth 5.0, this also means you’ll get a more stable connection, reduced latency, and better compatibility with newer smartphones, making it a solid choice for both audio streaming and hands free calling.
One of the KM18’s standout features is its 1.44-inch LCD screen. The display shows essential information such as the current FM frequency, battery voltage, and caller ID.
The screen is bright and easy to read, even in daylight, making it convenient for monitoring settings while driving.
The KM18 includes a 5V/2.1A USB charging port, enabling people to charge their devices while using the transmitter.
This feature is particularly useful for people who rely heavily on their smartphones for navigation or music streaming.
The flexible gooseneck on the KM18 allows you to adjust the position of the device to your preference, enhancing ease of use and accessibility while driving.
The flexibility of the gooseneck also means it can fit in various car models without obstructing other dashboard controls.
The KM18 includes an equalizer that allows you to adjust the sound frequency according to your preferences.
Although not as advanced as a full EQ found on high end car audio systems, these basic options provide some degree of customization for a more enjoyable listening experience depending on they type of music you listen to.
Let’s get this off our chest right from the start. FM transmitters inherently face challenges with sound quality, largely due to signal interference, limited bandwidth, and FM transmission restrictions, which can make it hard to achieve the clarity and depth of audio provided by Bluetooth or direct AUX connections. However, in spite of that, the Nulaxy KM18 stands out among FM transmitters, delivering pretty solid performance within these technical limitations.
The KM18 helps to mitigate any performance issues with manual frequency selection. This means you can choose a frequency that isn’t in heavy use within the local area so you can minimize interference and try to achieve a cleaner and clearer sound. This feature is especially useful for drivers in rural or less densely populated areas where the FM spectrum is less crowded. However, In more urban or congested radio areas the KM18 may encounter slight static or distortion due to overlapping signals. Nevertheless, its overall sound quality remains quite satisfactory for general listening purposes.
In terms of audio range, the KM18 delivers a well balanced profile with bass, midrange, and treble levels that are pleasant for casual listening. The bass has a moderate punch, and the treble is crisp enough to avoid sounding tinny, though audiophiles who favor a more robust or customizable listening experience may notice some limitations.
Unlike high end audio systems, the Nulaxy KM18 lacks advanced EQ settings, which could provide more control over audio tones. As a result, the sound can sometimes feel flat or lacking in depth, especially for people who enjoy rich bass or intricate highs. However, for most of you, seeking a convenient and budget-friendly way to play audio through their car speakers, the KM18’s sound quality is generally considered very good.
Setting up the Nulaxy KM18 is pretty simple and straightforward. You’ll plug the unit into the car’s cigarette lighter, set the FM radio to an unused station, and tune the KM18 to the same frequency.
Pairing a smartphone with the KM18 via Bluetooth is also pretty quick, usually requiring only a couple of steps. Turn on bluetooth on your phone, and find the Nulaxy to pair. Hey presto, all done.
The interface of the KM18 is intuitive, with a large button layout that makes it easy to control while driving. The adjustable gooseneck design further improves accessibility, ensuring that drivers can view the screen without straining.
Controls for adjusting volume, answering calls, and changing tracks are conveniently placed, which minimizes distractions.
The Nulaxy KM18 also provides hands free calling via Bluetooth 5.0, allowing you to answer, reject, or end calls with a single button on the device, this means that your connection will be more stable with less latency; and it’ll generally provide a more consistent audio experience compared to other Bluetooth versions, such as 4.2, and 3.0.
The built-in microphone also includes “noise suppression technology”, which should reduce background noise to improve call clarity. In quieter environments, call quality is generally clear, though road noise or driving with the windows down can still impact voice clarity depending on if you’re speaking with a professional public speaker, or your 80 year old granny. In this respect, the KM18 meets the needs of those who make occasional calls on the road, although it won’t reach the clarity of a dedicated, built in car Bluetooth system.
The KM18 is compatible with a wide range of devices, including most Android and iOS smartphones. It supports multiple audio sources, such as Bluetooth 5.0, (as mentioned above), USB drives, microSD cards, and auxiliary inputs, making it adaptable for people with different audio preferences.
To set it up, plug the device into your car’s cigarette lighter, match the KM18 and car radio to the same FM frequency, and connect via Bluetooth.
Just note, that those of you in areas with high radio traffic may need to adjust frequencies to maintain a clear connection, as we mentioned above.
The Nulaxy KM18 FM transmitter is suitable for drivers looking for an affordable way to add Bluetooth streaming, hands free calling, and multiple audio source options to their car’s existing audio system. It’s a no brainer.
It meets the needs of those who require basic functionality without advanced audio or call quality expectations. Its simplicity, Bluetooth 5.0 connectivity, and versatile input options make it a good choice for everyday commuters or casual listeners.
Those of you in areas with crowded FM bands or those who need premium sound quality may need to retune frequently or consider other solutions, such as direct AUX inputs or dedicated Bluetooth adapters. For drivers who prioritize practicality and are comfortable with the occasional retuning, the KM18 offers a balanced mix of features and affordability.
Yes!
The Nulaxy KM18 is a great investment for anyone looking to add Bluetooth functionality, hands free calling, and wireless music streaming to their car without spending hundreds on a new audio system.
With its strong connectivity, crisp sound quality, multiple playback options, and dual USB charging, the Nulaxy KM18 provides excellent value for money. While minor FM interference may occur in some areas, the overall performance and convenience far outweigh any drawbacks.
So, If you want an affordable, reliable, and feature-packed FM transmitter, the Nulaxy KM18 is one of the best choices available. What are you waiting for?
Article By: Dale Ogden
Dale is a highly respected automotive industry expert, renowned for his pioneering work in vehicle forecasting and asset management. As the founder of Check Your Spec and former Forecast Manager at CAP HPI (the UK equivalent of Kelley Blue Book), he spearheaded the development of forecasting strategies and depreciation models for internal combustion, hybrid, and electric commercial vehicles. With over two decades of experience, Dale pioneered EV forecasting models now used by major manufacturers, and has generated residual values for over 10,000 new vehicles.
Setting up your Nulaxy KM18 is relatively simple. Follow these steps:
To change the frequency on the Nulaxy KM18:
The ideal radio station for your FM transmitter is one that is not in use in your area. This means it won’t interfere with other stations or cause static. Typically, frequencies between 87.5 MHz and 108.0 MHz are used for FM transmission. Try picking a frequency where you don’t hear any local radio stations broadcasting. If there is interference, change the station by following the steps to adjust the frequency on the Nulaxy KM18.
Nulaxy is considered a reliable brand for affordable and user friendly Bluetooth FM transmitters, especially for drivers who want an easy way to add Bluetooth functionality to their car’s audio system without major installation. Their products are widely used for hands-free calling, music streaming, and charging devices in the car.
While they provide a good mix of features for the price, some users may find that audio quality can suffer in areas with heavy radio signal interference. Overall, Nulaxy is a good option for people seeking a budget-friendly solution for FM transmission.
To reset your Nulaxy Bluetooth FM transmitter:
To connect your Nulaxy wireless FM transmitter:
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