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Foursevens QS2LX Quark Smart Bluetooth - 950 Lumens

$97.99 CDN

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Length: 4.8 in
Diameter: 0.86 in
Weight: 1.76 oz
LED Emitter CREE XM-L2
Voltage range 4.0-8.4 V
Spot Beam Angle: 29.2 Degrees / Diameter at 3 meters: 780 mm
Flood Beam Angle: 62.8 Degree / Diameter at 3 meters: 3.7 meters
Brightness Levels Moonlight: 1 lumens, 19 days
Low: 50 lumens, 10 hrs
Medium: 350 lumens, 2 hrs
High: Burst at 950 lumens, 1 minute
                then 475 lumens, 1.6 hrs
Special Modes Strobe: 3.2 hrs
SOS: 4 hrs
Beacon(hi): 6 hrs
Beacon(lo): 10 hrs
Reflector Textured
Body Material Type-III hard-anodized aircraft-grade aluminum
Bezel Material Type-III hard-anodized aircraft-grade aluminum
Lens Material Optical-grade glass lens, sapphire coating, antireflective coating

Uses 2 CR123A Batteries

The Quark Smart family is the next generation of FOURSEVENS flashlights, and our most versatile Quark lights yet. With our smart Bluetooth functionality, your flashlight can now communicate with your smart phone. Just grab the FOURSEVENS Smart Flashlights App, available now on the AppStore, and pair your Quark Smart to your phone. The app will allow you to check the current battery life and remaining runtime, configure the modes, and set proximity alarms.

And for anyone reluctant to connect their flashlight with their phone, the Quark Smart is still a fully functional Quark light even without pairing. Immediately out of the box, you can easily toggle through all eight output modes by double-clicking the side switch. Holding the tailcap switch will activate the light momentarily without accidentally switching to the next output.

As always, our Quark lights are waterproof and constructed with aircraft-grade aluminum and impact-resistant lenses. Quark lights have always been tough enough to meet any challenge. Now they are working harder and smarter to get the job done.

Please note: We have made some changes to the Quark Smart interface that have not yet been updated in the paper manual:

Side Switch Operation:

There are two basic ways to interact with the side switch:

  • Tap - A very quick press and release of the side switch
  • Hold - An extended press of the side switch. Do not release immediately

Side Switch Shortcuts, when the light is currently off:

  • 1 Tap = The Quark Smart will activate in Moonlight mode
  • 1 Hold = The Quark Smart will activate in Moonlight mode and continue to ramp up in brightness until you release the side switch
  • 1 Tap then 1 Hold = The Quark Smart will activate in Maximum output mode. You can release the side switch once the light activates. If you continue to hold the side switch, the light will ramp down in brightness until you release the side switch
  • 2 Taps = The Quark Smart will activate in Strobe mode


  • Model: FSQS2LX*
  • Manufactured by: Foursevens

This product was added to our catalog on Friday 26 August, 2016.