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K40 Laser Defuser

Discreet police laser speeding ticket protection....guaranteed.

Complete defense against police laser speeding tickets.

If you’ve ever seen a police officer parked and outside of his vehicle looking at traffic with what looks like a small movie camera or binoculars, you’ve probably just been targeted by LIDAR (Light Detection and Ranging), also known as laser.  Police laser guns are short-range (typically 1000 feet), and pinpoint accurate.  If the crosshairs of the laser gun are targeted on your vehicle and you’re speeding, they’ve got you, pull over, game over.

Unlike police radar, there is no advance warning with police laser guns.  Your only defense is a good offense with K40 Laser Defusers™.

K40 Electronics introduced the very first Laser Defuser in 1994 (which started the whole laser defense industry), so we know a thing or two about combatting police laser, including the latest variable pulse rate (VPR) guns used today. We build confidence and reliability into all of our products so that, you can drive without limits, knowing you’re protected.

We’re so confident in the performance and protection you’ll experience with our Laser Defusers, they are covered by our one-year “Ticket-Free Guarantee“.

Talk to a real expert.

A senior K40 product consultant answers every call, 24/7/365.
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Radar System Compatibility – All K40 Laser Defusers integrate with any K40 remote radar system, you receive alerts from a single warning display (LED(s) and a hidden speaker for both police radar and police laser alerts.

Stand-Alone Option – Already in love with your current or portable radar detector?  The K40 Laser Defusers can be installed on any vehicle with a stand-alone kit containing an LED and warning buzzer, giving you police laser protection you can’t get from a radar detector alone.

Laser Defuser Optix – Features

Each Laser Defuser Optix transponder contains a powerful Nanostack™ technology pulsed laser diode for high optical laser jamming output power and outstanding reliability.

  • Ultra-Compact Footprint for Discreet Placement
    The Laser Defuser Optix has a compact footprint that allows for a custom and discreet installation into grilles and other tight spaces.
  • Updatable to Ensure Optimum Performance
    The interface controller features a USB port so the systems software can be updated as new police LIDAR technology emerges.
  • Maximum Coverage Protection
    The in-vehicle sync interface can fire up to five transponders simultaneously for superior detection and maximum laser jamming output to combat the latest VPR LIDAR guns.

Three User-Selectable Transmit Modes

  • Constant Transmit: For as long as it’s receiving a police laser gun signal, the Laser Defuser Optix transponder will continuously transmit back to the gun.
  • Pulse Transmit: Upon receiving a police laser gun signal, the Laser Defuser Optix transponder will transmit an “error” signal back to the gun for up to five seconds. The system will then switch to Receive Only mode for 30 seconds.
  • Receive Only: The Laser Defuser will only detect police laser. No jamming signal will be emitted.
Laser Defuser Optix – Specifications
  • Operating Wavelength – 905 nanometers
  • Power Requirements – 11.5 – 16.0 Volts DC negative ground
  • Diode Type – Pulsed Nanostack™ technology laser with epitaxially stacked emitters
  • Transponder Dimensions – 2.2″ L x .54″ H x 1.1″ D
  • Sync Interface Dimensions – 3.5″ L x 1.0″ H x 1.9″ D
  • Operating Temperature – -40° to +165° Fahrenheit
  • Laser Class – Class 1 laser product (eye safe), compliant with Laser Product Performance Standards: US FDA 21 CFR, Part 1, Sub J, 1040.10 &11


  • What Is The K40 Consult?

  • Three K40 Laser Defuser Optix vs DragonEye Compact

  • Laser Defuser Optix Combats DragonEye Compact in Constant Mode

  • K40 Laser Defuser Optix Combats DragonEye in Pulse Transmit Mode

  • K40 Laser Defuser Optix vs Stalker XLR VPR

  • K40 Laser Defuser Optix vs Stalker XLR VPR - 2

  • K40 Laser Defuser Optix vs Laser Ally VPR

  • K40 Laser Defuser Optix vs UltraLyte LRB

Technabob K40 RL360i & Defuser Optix Review

“…on the open road when I got an alert, it was from an actual police car. In each case, I had at least a mile to slow down…the K40 system is the best I’ve ever experienced…” Read more

LaserJammerTests K40 Laser Defuser Optix Review

“The data speaks for itself…(Jam To Gun on all test runs)…I definitely stand behind the jammer…” Read More


K40 Laser Defuser g5 Review – Lab style and road tests. Results: As Advertised!

January 2014 Review.  A little history before getting to the fun stuff.

Another generation of the well known Laser Defuser brand has made it to the market.  Since 1996, K40 has been developing infrared speed detection inhibiting ‘plate frames.’  The jamming techniques have changed over the years (Brute/white noise to pulse match), but the customer…Read more

I don’t know what was up today but I must have been lasered ten times by NJ State Troopers in my 100 mile journey today. Not one of them came after me.

E. D. Speer

Manuals & Brochures

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Laser Defuser Information

Laser jammer laws vary from state to state.  Call us today at 800-323-5608 to discuss the legalities that may apply to you.  K40 has solutions for every vehicle, driver and driving location.

laser defuser coverage recommendations


LIDAR stands for “light detection and ranging.” A LIDAR/LASER gun transmits a pulsed rate of light at an object, the object reflects the pulsed light, and the instrument analyzes the speed of the reflection. Through this analysis, the speed and distance of the object can be determined. At typical target ranges of 800-1000 feet, a police laser gun beam measures between 18″ and 36″ in diameter. This narrow, infrared, monochromatic, one milliradian laser emission does not scatter like a police radar signal, so there is no advance warning to police laser use.

Unlike radar, laser guns give no advance warning. If you are targeted while speeding and you do not have a Laser Defuser (jammer), you will receive a speeding ticket. Laser is very short-range. Laser gun ranges vary from approximately 800-2000 feet. An officer cannot be moving/driving while shooting laser, and laser cannot read through glass. Laser can target and acquire a speed on a specific vehicle in a pack of cars. Radar is a radio frequency that leaves the gun and spreads out over a great distance. This is why radar detectors can pick up police radar from distances up to 10 miles away. Officers can drive and obtain radar speed readings on vehicles while they are in motion.

Laser Defusers detect the laser light signal transmitted by a police laser gun and notify drivers with a unique audible and visual alert hidden discreetly inside the vehicle’s interior. Simultaneously, the Laser Defusers transmit a return light beam at the same frequency as the police laser gun so the police cannot get a speed reading.

Laser guns are capable of measuring a vehicle’s speed in less than one second. By the time a laser detector alarms, it is already too late. Only laser jamming countermeasures like Laser Defusers can provide drivers with the time needed to react and safely reduce their speed to avoid a costly ticket.

Yes. The Laser Defuser systems are designed to detect and deactivate police laser signals only. Therefore, we recommend complementing a Laser Defuser system with any K40 Electronics portable/window mount or custom-installed radar detector to create a complete police radar and laser countermeasure solution.

Yes. K40 Laser Defusers have been designed to allow integration with preexisting K40 remote radar detection systems. This integration eliminates installing an extra warning light or speaker to receive alerts from the Laser Defusers.

K40 recommends three Laser Defusers be installed on the front of every vehicle. For optimum placement for your specific vehicle, you should consult with your installing dealer and/or call us at 800-323-5608. In all mounting locations, front or rear, Laser Defusers should be mounted parallel to the ground (not pointing up, down, or to the side) with a clear, unobstructed view of the road for maximum effectiveness.

Since the Laser Defusers emit an infrared light beam that does not interfere with radio waves or any devices regulated by the Federal Communications Commission (FCC), there are no federal laws banning the use of laser jammers. Some states do restrict the use of laser jammers, so K40 recommends checking your state statutes for specific information.

We have absolute confidence in the performance of our products, and you should never get a speeding ticket when they are operating and used properly. In the rare event you should receive a speeding ticket in the first 12 months of ownership, we’ll pay any and all fines (excludes attorney fees and/or insurance premium increases as well as tickets issued in school zones, construction zones, and/or when DUI or DWI is involved). No questions asked.

Drive Ticket Free Guaranteed

Get a ticket during the first year of ownership, we pay for it, subject to the terms and conditions below. Simply send us a copy of the radar or laser speeding ticket, your proof of payment of the ticket, and your receipt for your K40 purchase (These guarantees apply to the original K40 purchaser and are non-transferable).

We started offering this guarantee in 1983 and we still stand by it today!

Note: When applying for speeding ticket reimbursement, you must send a copy of your proof of purchase (a dated sales receipt) for your K40 Radar / Laser Detector, a copy (not the original) of the speeding ticket, and proof of ticket payment – a copy of the canceled check (both sides), money order, or court receipt. All information provided to K40 will remain confidential.

100% Ownership Guarantee

  • 100% Performance Guarantee – If your K40 Radar Detector or Laser Defuser does not outperform any other radar or laser protection system you’ve owned, return it within 30 days for a full product credit.
  • 100% One-Year Quality Guarantee – K40 will repair or replace any defective product for one full year from the date of purchase.
  • 100% Theft Guarantee – If your custom-installed remote radar detector is ever stolen, we’ll replace it.

To ensure you’re covered by all K40 guarantees, register your product today.


Terms and Conditions

  • Ticket-Free Guarantee not valid for tickets issued in school or construction zones, incurred with a DUI or DWI violation, or for tickets received outside the U.S. and Canada.
  • All K40 Electronics products carry a one-year “repair or replace” Limited Warranty. This coverage begins on the date of purchase and applies to defects in product materials and workmanship only. Installation, removal, or misuse is not covered.
  • In CanadaPlatinum100, RD950 and RLS2 portable models only –  Excludes any photo radar/laser and/or any tickets issued that do not accumulate demerit points.
  • Installed radar detector systems must include the purchase of at least one Laser Defuser in order to be covered for any laser speeding ticket reimbursement.
  • Theft claim must include a complete copy of police report indicating details of loss to due theft, proof of purchase from an authorized K40 dealer, and proof of insurance reimbursement if applicable.  NOTE: the theft guarantee excludes portable radar detectors.