Magene L508 Radar Review: A Worthy Alternative to Varia

Magene L508 review: Magene L508 on my bike.

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This is my Magene L508 radar with taillight review.

Magene introduced it during the Eurobike 2022 fair (although they didn’t have its booth there).

I already tested Garmin Varia RTL515, so in this article, you also learn how these two radars differ and perform.

In short: I believe Magene L508 is a worthy and cheaper alternative to Varia. You can order it here.

Continue reading for more info.

Magene L508 Summary

Thanks to the popularity of Varia RTL515, it was only a matter of time before other manufacturers introduced their cycling radars with taillights.

Unfortunately for them, Garmin patented the technology, making it harder for others to get a piece of the market share.

Although it remains to be seen how the legal side of things will play out, the Magene L508 is one of the first* direct alternatives to the Varia RTL515.

*Bryton also introduced its radar with a taillight on Eurobike called Gardia R300.

It brings a few new features (more about them below) and seems like a promising newcomer.

Here is what the box includes:

Magene L508 box on a wooden bench.
Magene L508 box
Magene L508 box contents (radar, manual, charger, tether, mount, rubber loops.
Magene L508 box contents

The rubber mount is universal and suitable for rounded, D-shaped, and V-shaped seatposts.

There is also a tether, so you have another layer of security.

Also available at

Magene L508 Setup

L508 is compatible with most head units that have ANT+ and Bluetooth connectivity.

Once you pair it with your bike computer, the following warning will appear:

After this process, you can start using it.

How Does Magene Radar Work?

Magene L508 works on the same principle as Garmin Varia radars.

It transmits and receives radar signals reflected by the moving object.* Then, it shows it on your bike’s computer screen, so you know how far away from you the object is.

*This is why testing both radars side by side is impossible because they interfere with each other.

My Experience with Magene L508

Based on my two weeks’ use, I summarize Magene L508 as follows.

  • It detects cars as quickly as Varia radars.
  • It gives me more false positives (it notifies me about a car that’s not there) than Varia.
  • The mount ‘lock’ feels looser than the Garmin mount, but holds securely. It tends to slide on the seatpost, but not as often as Garmin’s.
  • The light/flash is less bright than Varia RTL515.
  • The light flashes only a few seconds when being overtaken, not the entire period (see the following video).
Magene L508 changes its flash pattern for a few seconds while detecting an object (not for the entire period)

I also have full confidence in its IPX7 protection:

Magene L508 mounted to my bike and covered by mud after a cross ride.
L508 is IPX7 proven

Magene 4.99 USD ‘Subscription’

Some people panicked when they learned that the light modes were only available by paying a $4.99 subscription fee.

Let me set this myth straight.

In the radar package is the following card:

Magene L508 subscription card with radar on a wooden table.
Magene subscription

Its text indicates that after linking the radar to the Magene Utility app and signing up for a Magenius subscription, you can unlock the “Customizable light modes setting.”

This customization allows you to change the light intervals. For example, from 2 to 3 seconds, etc.

Three screenshots from Magene app - customization of flashing intervals.
Customization of flashing intervals in Magene app – Premium feature.

The subscription is a one-time payment, so it’s not recurring. You can also sign-up for the Magenius newsletter and avoid paying this fee.

The Magene app allows you to turn off certain modes or auto-sleep for free.

Magene L508 vs. Garmin Varia RTL515

There is no doubt the similarity between L508 and Varia RTL515. Garmin clearly inspired Magene.

Magene L508 in my hand.
Magene L508

So how do both radars compare in terms of technical parameters? Check out the following table.

FeatureMagene L508Varia RTL515
Dimensions94×38×25 mm
3.7×1.5×0.98 in
98.6×19.7×39.6 mm
3.9×0.8×1.6 in
Claimed battery life6 hours solid
8 hours peloton
10 hours flash
12 hours pulse mode
6 hours solid
8 hours peloton
6 hours night flash
16 hours day flash
Brake sensingYesNo
Auto stand-byYesNo
Lumens20 (solid + flashing mode)
6 (peloton mode)
3-20 (pulse mode)

20 (solid mode)
8 (peloton mode)
29 (night flash)
65 (day flash)
Light modesSolid, peloton, flash, pulse Solid, peloton, night flash, day flash
Customizable light modesYes (paid subscription)No
Water resistanceIPX7IPX7
Viewing angle220°220°
Horizontal detection angle40°40°
ProtocolsBluetooth, ANT+Bluetooth, ANT+
BuyCheck PriceCheck Price
Check Price (
Check Price (
This table compares the main features of Magene L508 vs. Garmin Varia RTL515.

Magene L508 looks sleeker but similar to Varia RTL515. However, I don’t think its glossy finish was a wise choice. It will probably scratch easily when cleaning off the dirt.

L508 is incompatible with Garmin mounts (if you mount it in, it will be rotated sideways).

Magene L508 in a Garmin mount is rotated 90° sideways.
Magene L508 in a Garmin mount

L508 has 5 light modes:

  • Solid
  • Flash
  • Peloton
  • Pulse
  • Unknown
  • Standby
Magene L508 light modes: Solid, flashing, pulsing, peloton, and ‘unknown mode’

All modes are the same as on RTL515, except the ‘Pulse mode,’ which is new. It only changes the brightness of the light from dimmer to brighter.

I like that L508 comes with USB-C charging port like RCT715. RTL515 uses a MicroUSB port.

L508 can detect if you slow down. If you do, it increases the brightness of the light to warn those behind you.

Magene L508 - brake sensing
Magene L508 – brake sensing | Source:

The last feature I want to highlight is auto-sleep. The radar can automatically go into sleep mode after detecting your bike in a stationary position for longer than 5 minutes and automatically turns on once you start riding. Remember, this feature has to be enabled using the Magene smartphone app.

Things to Consider Before Buying a Bike Radar

Garmin Varia RTL515 proved to be highly reliable. Sometimes, it gives you a false positive (shows a car that’s not there) but never misses one (i.e., false negative).

Magene L508 works well and also has a few benefits over Varia. See the following video for more details.

Remember, if you buy a device like this cycling radar, you should have zero tolerance for false negatives*. But you also shouldn’t 100% rely on radars and you should use your other senses while cycling.

*Here is the explanation of the possible scenarios:
True positive = there is a car and radar alerts you.
True negative = there is no car, so the radar won’t alert you.
False positive = there is no car, but radar alerts you.
False negative = there is a car, but the radar won’t alert you.

Magene L508 FAQ

My Verdict

It’s great to see some competition for Garmin Varia radars finally.

The competition is good for the consumer. Hopefully, it will force manufacturers to innovate and improve their products or reduce prices.

L508 performs as it should. It offers more light modes and has a few extra features (like smart brake sensing).

I only have a few complaints. The light could be brighter, the battery life longer, and the change of the light pattern when overtaking should last the entire time, not just a few seconds.

Except for these details, I can recommend it.

Also available at

What do you think about the new Magene L508 radar with taillight? Let me know in the comments.

The product for this review was kindly provided by the manufacturer. This did not influence my overall verdict or my opinion about the product.

2 thoughts on “Magene L508 Radar Review: A Worthy Alternative to Varia”

  1. Again, this device will not work with a phone because there is no phone app. Their supposed phone app is only for setting the flash timing. This device must have a dedicated bike computer. Whereas the Garmin radar does have a phone app and will work with either a phone or bike computer. The lower price is misleading because of this.

    1. Hi Gregory,
      Yes, you are right. Their app is only for adjusting the timing.
      Theoretically, L508 should work with 3rd party apps like Cadence because it has Bluetooth connectivity. I contacted the developer of Cadence because it doesn’t work. He is working on a fix.
      It would be interesting to see how many people use Varia radar with a phone. I guess, maybe 10 % of all customers?
      – Petr

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