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- Brighter when braking automatically
- Switches on and off by itself in modes 1 and 2
- Up to 50 h battery life, depending on mode
- 2 mounts included saddle rails or seatpost
“The brake light works at the slightest touch of the brakes.”
Specifications
- LEDs
- 20
- Brightness
- 3 levels
- Battery
- Up to 50 h depending on mode, 30 h in steady mode
- Charging
- USB-C, cable included
- Auto on/off
- On when you ride, off after 30 s standing still; in modes 1 and 2 (Flash and Breathe)
- Light sensor
- Off in daylight in modes 1 and 2
- Brake light
- In every mode
- Protection
- IP65, dust-tight and protected against water jets
- Size
- 40 × 34 mm
- Mounts
- Saddle rails and seatpost
What’s in the box

- VK-Q5 rear light
- Saddle rail mount
- Seatpost mount
- USB-C charging cable
- Allen key
- Instructions
Brighter the moment you brake
Just like a car’s brake light: anyone riding behind you can see you’re slowing down.
-
Detects braking by itselfNothing to press.
-
In all 4 light modesSteady mode included.
4 modes, 3 brightness levels
3 brightness levels: press and hold the centre button to make it brighter or dimmer.
-
Flash
Auto on/off
-
Breathe
Auto on/off
-
Flash 2
-
Steady
- Brake light in every mode
- Automatic on/off only in modes 1 and 2. In modes 3 and 4 you switch it off with the button.
Fit it in 3 steps
-
Tighten the mount under the saddle with the included Allen key -
Screw the light onto the mount clockwise -
Done
-
Wrap the rubber mount around the seatpost and hook it in place -
Adjust the angle so the light points backwards -
Screw the light onto the mount. Done.
- Aero seatpost? Under the saddle
- Saddle bag on the rails? On the seatpost
What cyclists say
How we check reviews
“Verified purchase” means the person bought the VK-Q5 from us; we match it against the order. Reviews from the Shop app are checked by Shopify. Reviews without this label can’t be matched to a purchase.
Frequently asked questions
Will it fit my bike?
Two mounts are included: one for the saddle rails and one for round seatposts. Aero seatpost: use the saddle rail mount. Saddle bag on the rails: use the seatpost mount. Not sure? Send us a photo of your bike to info@vairok.com.
Does it work in daylight?
Yes, in modes 3 and 4 (Flash 2 and Steady). In modes 1 and 2 the light sensor switches it off in daylight.
How do I charge it, and how long does the battery last?
Via USB-C; the cable is included. Up to 50 h depending on the mode, 30 h in steady mode.
Does it really switch on and off by itself?
Yes, in modes 1 and 2 (Flash and Breathe): it switches on as soon as you ride off and off after 30 seconds at a standstill. If you don’t want the auto mode, switch to mode 3 or 4; there you turn it off with the button.
Does the brake light work in every mode?
Yes. In all four modes it gets brighter when you brake.
Can it handle rain?
Yes. With IP65 it is dust-tight and protected against water jets. Just don’t submerge it or use a pressure washer on it.
Which light modes does it have?
Four: Flash, Breathe, Flash 2 and Steady, each with 3 brightness levels. To change the brightness, press and hold the centre button.
When will my order arrive?
We ship from Barcelona. Shipping cost and delivery time depend on your country and are shown at checkout. You’ll get the tracking number by email.
What if I don’t like it?
You can send it back within 14 days of receiving it. Write to info@vairok.com.










