Launching in South Africa

Your car never heard the lock.

Thieves use cheap pocket jammers to drown out your remote. You walk away, your car stays open. JamGuard catches it and tells you on your keychain. Green means locked. Red means go back.

Reserve yours - R999 Try the jammer →
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A thief with a jammer next to a parked car at night

01 / 05

You press LOCK.

You hear nothing unusual. You walk towards the mall.

02 / 05

A jammer drowns it out.

Behind a pillar, a pocket device floods 433 MHz with noise. Your car never hears the signal.

03 / 05

Your car stays open.

No beep. No flash you notice. No broken glass.

04 / 05

Bags. Laptop. Gone.

No sign of a break-in, so some insurers start asking awkward questions.

05 / 05

Unless your keys tell you.

JamGuard flashes red the moment the jammer starts. You turn around, lock by hand, and the thief gets nothing.

Interactive

Be the thief.
Watch JamGuard catch you.

This is what the car unit sees: a live view of the 433 MHz band. Press lock, switch on the jammer, and watch the keychain react.

433.92 MHz ± 2 MHz CLEAR
431.9432.9433.9434.9435.9

Pick a scenario.

How it works

Two small devices.
One glance.

01

Plug it in

The car unit goes into the OBD-II port under your dashboard, the same port mechanics use. No wiring, no installer, ten seconds.

02

Lock as normal

Use your remote like always. JamGuard checks your car really locked and listens for jamming at the same moment.

03

Glance at your keys

Green: locked and safe. Red: still open or jamming detected, so go back. It even checks by itself as you walk away.

JamGuard car unit plugged into the OBD-II port under a dashboard
UNIT ACar unit. Hidden under the dash. Detects jamming on 433 MHz and reads lock status from the car.
JamGuard keychain glowing green next to car keys
UNIT BKeychain. Lives on your key ring. Rechargeable over USB-C, lasts weeks per charge.

The only manual you need

No app. No screen.
Just light.

Solid green

Locked, no jamming. Walk away.

Solid red

Still unlocked. Press lock again.

Flashing red + buzz

Jammer nearby. Go back and lock by hand.

Red / green

Out of range, or the unit was unplugged.

Engineered properly

Small. Silent.
Safe for your car.

0scans / sec

Jamming detection

Samples the 433 MHz band 500 times a second and recognises the steady noise a jammer makes, without false alarms from normal remotes.

Reads real lock status

Listens to the lock messages your car already sends. Listen-only: it can never unlock, start or control your car.

Tamper-proof signal

Every message to your keychain is cryptographically signed, so nobody can fake a green light.

Protects your battery

Deep-sleeps if your car battery gets low, so your car still starts after two weeks at the airport.

Checks as you walk

A motion sensor wakes the keychain when you move, so it confirms your car is locked without a button press.

0transmissions on your car's frequency

Receive-only radio

JamGuard never transmits on your car's remote frequency. Jammers are illegal. JamGuard is the opposite, and it is built to meet ICASA rules.

Early-bird pricing

One price.
No subscription. Ever.

For the first production batch. Reserve now and pay nothing until it ships.

JamGuard

Car unit + 1 keychain

R1 299 R999

  • OBD-II car unit
  • Rechargeable keychain
  • USB-C charging cable
  • 12-month warranty
Reserve
Best value

JamGuard Duo

Car unit + 2 keychains

R1 599 R1 249

  • Everything in JamGuard
  • Second keychain for your partner
  • Both keychains see the same car
  • 12-month warranty
Reserve Duo

Fleet & business

Car rentals, dealers, fleets

Volume pricing

  • 10+ vehicles
  • Branded keychains
  • Installer support
  • Insurer partnerships
Talk to us

FAQ

Questions drivers ask.

Will it work on my car?

JamGuard works with cars that have an OBD-II port, which is almost every petrol car from about 2006 onwards and most diesels from 2007. Jamming detection works on every one of them. Reading lock status works on most popular models, and we're testing more brands before launch. Tell us your car when you join the waitlist.

Is it legal?

Yes. JamGuard only listens: it never transmits on your car's remote frequency and it never sends commands to your car. Jammers are illegal. JamGuard is the opposite.

Will it drain my car battery?

No. It uses very little power, and it watches your battery voltage. If the battery runs low, for example at the airport for two weeks, it goes into deep sleep so your car still starts.

Can a thief use it to open my car?

No. The car unit is listen-only on your car's network and has no way to unlock or start it. Messages to your keychain are signed, so they can't be faked either.

How far does the keychain work?

Roughly 10 to 40 metres, depending on walls and the parking lot. That covers the moment you walk away from your car, which is when jamming happens.

How long does the keychain battery last?

Several weeks per charge in normal use. It charges over USB-C, like your phone.

Does it replace my alarm or tracker?

No, it works alongside them. Alarms and trackers help after a break-in. JamGuard helps stop the easiest break-in of all: a car that was never locked.

When does it ship?

We're finishing road testing now. Waitlist members get first access, the early-bird price and delivery updates. No payment until it ships.

Be first in line

Don't walk away
blind.

Join the waitlist to lock in the early-bird price. No payment now, cancel any time.

  • R999 early-bird price, saving R300
  • First production batch
  • We'll confirm your car is supported