About Us

We built K40 around our customers – fast-lane drivers who expect the best.

K40 Electronics has kept drivers ticket-free since 1981 with the industry’s first and best “Ticket-Free Guarantee.” We believe in our products’ performance and value our relationship with our clients and vendor partners even more.

Who We Are

We are committed to supporting and partnering with independent retailers and select car dealerships that keep Main Street and America going.

We don’t sell our products through a big box or large chain stores. We think small business is essential. More than ever, we believe that there is value in knowing who you are buying from and how much they care about your experience. Our expert installers are hand-picked by K40 and share the same level of dedication to our customers.

A Message from K40’s President, Peggy Finley

Peggy Finley

I want to start this letter the same way we begin every day here at K40 Electronics. In Appreciation.

Appreciation for every customer who has ever purchased our products. Appreciation for our network of retail stores and car dealerships.

Many of our customers go back 30 years, with the introduction of the first machine wound, high-performance CB antenna. Some have just purchased their first custom-installed radar/laser detection system, and many have been driving with K40 protection for decades. It’s vital that you know each time you choose K40 products and protection, you are backed by a company of real people who genuinely care about your complete satisfaction.

Our network of retail stores and car dealerships are hardworking, committed professionals who have persevered within an ever-changing and often unpredictable market. Retailers who didn’t quit when faced with “Big Box” competition continue to reinvent themselves and offer white glove, personal service to their customers, thereby setting themselves apart from Internet resellers. They offer integrity and satisfaction their customer’s demand. We started with you, and we’re staying with you. We appreciate you.

I am proud of the company we are, the products we offer, and the relationships we have forged. You all matter to us. And we are blessed to have you in our lives.

Peggy Finley
President, K40 Electronics

K40’s History and Achievements

1981 – K40 Launches First Radar Detector

1981 – K40 Launches First Radar Detector

K40’s first superheterodyne radar detector hits the market. The dash-mounted unit weighs almost three pounds!

1983 – First Custom Installed Detector

1983 – First Custom Installed Detector

K40 introduces the industry’s first custom-installed remote radar detector. Sold exclusively through high-end automotive electronics retailers.

1983 – Ticket Free Guarantee

1983 – Ticket Free Guarantee

K40 offers the first manufacturer-backed Ticket-Free Guarantee: “If you get a speeding ticket, we’ll pay for it!”.

1984 – K40 Partners with Elite Dealerships

1984 – K40 Partners with Elite Dealerships

K40 targets the luxury car market by selling through elite dealerships and designing remote systems exclusively for BMW, Mercedes-Benz, and other luxury carmakers.

1985 – Sonarradar™ Technology Introduced

1985 – Sonarradar™ Technology Introduced

Sonarradar™ is introduced as the industry’s first radar detector with separate front and rear radar receivers with microprocessor technology to deliver full 360° protection.

1988 – Theft Proof System Introduced

1988 – Theft Proof System Introduced

The Undetectable™ introduced – first totally hidden, theft-proof radar system.

1991 – Chipsradar™ is Introduced

1991 – Chipsradar™ is Introduced

Chipsradar™ combined K40’s remote radar with a VHF receiver alarm system for California drivers to detect California Highway Patrol (CHIPS) cars.

1993 – Superwide Radar is Added

1993 – Superwide Radar is Added

K40 Electronics introduces a “game changer” with the first ever remote mounted “Superwide” radar receivers. These revolutionary receivers picked up all bands of radar including the newest form of Superwide Ka-band radar.

1994 – K40 Introduces Laser Defuser™

1994 – K40 Introduces Laser Defuser™

K40 introduces Laser Defuser™, the first-of-its-kind defense system for new police laser guns. Hidden electronics mount in the license plate holder.

1995 – SS700 SWL and SS3000 SWL Hit the Market

1995 – SS700 SWL and SS3000 SWL Hit the Market

K40 Electronics begins selling the SS700 SWL and the SS3000 SWL, the first completely integrated Superwide radar receiving systems that include laser detection. The same stealthy interior alerts now alert to all police radar and laser targeting.

1995 – The RD650VG-2 is Launched

1995 – The RD650VG-2 is Launched

Portable Radar RD650VG-2, K40’s first all-band portable detector with laser detection is launched.

1997 – Laser DefuserPlus™ Introduced

1997 – Laser DefuserPlus™ Introduced

The highly-acclaimed second generation Defuser with improved performance and alert system.

2001 – Improvements in Installation and Alert Capabilities

2001 – Improvements in Installation and Alert Capabilities

A redesign of both the portable and remote systems streamlined the units and used the latest technologies to ease installation and improve alert capabilities.

2003 – RD850 Portable Radar/Laser Detector introduced

2003 – RD850 Portable Radar/Laser Detector introduced

The RD850 offered improved performance and detected the latest police Ka-band radar guns.

2005 – Wireless Technology Introduced

2005 – Wireless Technology Introduced

Calibre™ Radar/Laser System – The first radar/laser system to incorporate breakthrough wireless technology, a One Touch™ remote control, and multiple alert settings.

2007 – Laser Defuser EX & EX2 Introduced

2007 – Laser Defuser EX & EX2 Introduced

This fourth generation Laser Defuser technology is smaller and offers improved laser detection. Additional dual model design for larger vehicles.

2010 – RL-Series Introduced

2010 – RL-Series Introduced

The all-new RL-Series of remote radar detection systems introduced – With the introduction of the FULLY programmable RL200 and RL360 radar systems, drivers are able to program their radar/laser protection systems to fit their vehicle and driving habits. The RL-Series is the first comprehensive protection system controlled and programmed through the visor-mounted remote control.

2010 – RL100 is Launched

2010 – RL100 is Launched

RL100 Portable Radar/Laser Detector is the first K40 protection solution to offer GPS pinpoint location recognition and Quiet Ride which allows drivers to silence all alerts below a defined speed.

2012 – K40 Laser Defuser g5 Introduced

2012 – K40 Laser Defuser g5 Introduced

K40 Electronics introduces the NEW K40 Laser Defuser g5. K40’s 5th generation of laser defuser, the Laser Defuser g5 emits a powerful infrared light signal back to the police laser gun at a pulse rate that it cannot understand. This enables the driver to avoid detection and, ultimately, a speeding ticket. The new Laser Defuser g5 interface module allows up to three additional laser defusing transponders that mount on separate sides of the vehicle, front or rear, for maximum coverage and performance.

2012 – RL360i and the RL200i Introduced

After a full year of dealer and consumer feedback on the very popular RL-Series of installed radar detectors with GPS technology, K40 releases the RL360i and the RL200i. The remote control was redesigned and new features were added. The LEDs are now dimmable, there are 5 volume settings, and, when incorporating the Laser Defuser g5, the Laser Defuser has 3 levels of functionality.

2014 – April 2, 2014 Proclaimed as “Peggy Finley Day”

2014 – April 2, 2014 Proclaimed as “Peggy Finley Day”

Peggy Finley, President and Owner of K40 Electronics, was honored with her own day by the town of West Dundee, IL. West Dundee Village President Christopher Nelson proclaimed April 2, 2014 as “Peggy Finley Day,” Peggy Finley has been an active supporter of the community and of the Boys & Girls Club of Dundee Township, where she is a member of the board. She has donated over $350,000 to improve the lives of School District 300 students and their families. Peggy Finley has personally worked to better the lives of students and residents by volunteering to renovate the Boys & Girls Club’s teen center and administrative offices, as well as purchasing a new 15-passenger van for field trip transportation. She has always encouraged those at K40 Electronics to volunteer whenever they can. “K40 is proud to be a small business making a difference not only for other small businesses, but also for our community,” says Peggy Finley.

2015 – K40 RD950 is Introduced

2015 – K40 RD950 is Introduced

Introducing the K40 RD950 Portable, All-Band Radar and Laser Detection. The K40 RD950 offers you superior protection from speeding tickets. Guaranteed. The RD950 also features our innovative K-Band Filter. This filter helps eliminate false alerts from OEM radar-based accessories. No more K-Band alerts from adaptive cruise control or lane departure warning systems!

2015 – K40’s New RLS2

2015 – K40’s New RLS2

Portable Radar and Laser Protection with GPS taken to a whole new level!

2015 – New Features for the RL360i and RL200i

2015 – New Features for the RL360i and RL200i

K40 begins shipping the 2016 model RL360i and RL200i remote radar detection systems with several added features: Mark to Mute – Silence certain radar/laser alerts when within a specific GPS location. No more falsing from automatic doors and security systems. K-Band Filter – Rejects alerts from vehicles on the road equipped with radar-based safety features, such as Adaptive Cruise Control and Blind Spot Assist. A redesigned, all-black remote control.

2016 – Laser Defuser Optix is Introduced

2016 – Laser Defuser Optix is Introduced

Utilizing a laser diode – the latest laser jamming technology – K40 evolves their police laser gun countermeasure product line by introducing the Laser Defuser Optix.

2016 – RL360i and RL200i Launch

2016 – RL360i and RL200i Launch

The K40 RL360i and RL200i Expert custom installed radar detector systems are launched. Inspired by installers, the Expert Control Unit is a permanently installed, yet easily concealable component that looks and functions just like other factory installed vehicle controls, including back-lighting for easy button identification in low light conditions.

2018 – Integration Ready

2018 – Integration Ready

K40 introduces the RL360di and RL200di as the world’s first integration-ready radar detector systems. By integrating with the Automotive Data Solutions (ADS) iDatalink® Maestro RR interface and select Kenwood/JVC radios, the new systems address the growing trend of vehicle integration and connectivity by offering drivers a visual and touch on-screen user experience.

2020 – Platinum100 is Launched

2020  – Platinum100 is Launched

K40 releases the Platinum100. The world’s first remote controlled portable radar detector with Laser Defusers add-on capabilities.

2020 – LNA (Low Noise Amplifier) Radar Receivers Added

2020 – LNA (Low Noise Amplifier) Radar Receivers Added

K40 releases all new Platinum Series custom installed radar detection systems utilizing LNA (Low Noise Amplifier) radar receivers for up to a 40% increase in range and sensitivity. More customizable features add for an even better consumer experience.

Community Outreach

K40 and and its employees are dedicated to our community of greater Elgin, Illinois and Kane County. This involvement goes beyond our core business activities and focuses on building relationships and supporting local initiatives. One of those organizations is the Boys & Girls Clubs of Dundee Township, who we have been supporting since 2010.

  • k40 Welcome Boys & Girls Club Blue Voices, 2016
  • Photo of Boys & Girls Clubs of Dundee Township administrators receiving donation check from k40 Electronics
  • k40 gift of a van
  • K40 Award