K40 has been creating the best radar detectors in the world since 1981, and we invented the world’s first laser jammer in 1994. Our commitment to product excellence – coupled with the real-world expertise and dedication of the K40 team – is what keeps customers coming back again and again. It is this confidence in our products, our people, and our network of elite dealers that allows K40 to offer the most customizable speeding ticket protection products available anywhere. All of K40’s products are backed by the most comprehensive set of guarantees in the industry, including the world’s first ticket-free guarantee.

RL360di Front and Rear Radar Detection

Laser Defuser Optix Detects and Jams Police Laser

RL200di Front Radar Detection

RLS2 Portable Radar and Laser Detector

We built K40 around our customers – fast-lane drivers who expect the best. Your K40 Five- Star Customer Experience begins with a consultation with a K40 product engineer who customizes your radar and laser detection system for the way you drive. Your system is installed by a Master Craftsman from K40’s elite dealer network. And our in-house team of experts is on-call and available 24/7, helping ensure you’re always receiving the ultimate protection from police radar and laser.


We deliver the best police radar detector and laser jammer systems in the world – backed by the kind of Five-Star care you expect and deserve.

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1447 Grand AVE
Billings, MT 59102

Tel: 406-656-6155


Mon - Fri: 10am - 6pm

Saturday: Showroom Closed. Appointment only... Until Further notice.

Sunday: Closed