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Clifford Concept 650

Clifford Concept 650 MKII Thatcham Approved Cat 1 logo

0% financeThe Clifford Concept 650 MkII is the system of choice for most cherished vehicle owners. This is a stable product that has been around for many years and is widely regarded as the best non-canbus device for your car or van. For some of our customers there is no choice when it comes to Cat 1 car alarms as this system does it all.

We are experienced at installing the Clifford Concept 650 for Guildford to Southampton areas, including Portsmouth and West Sussex and have been fitting this system into cars for over fifteen years.

Clifford Concept 650 MKII supplied and fitted for £499* Extra Parts and Labour will incur a reasonable additional charge e.g. door motors cost extra.

Thatcham Car Alarm

Clifford Authorised DealarThese are Thatcham Car Alarm, a phrase that will make your insurance company happy. To qualify they must be a UK destined product fitted by a Clifford authorised installer. Thatcham is a UK institution that regulates the safety and security in the automotive market for vehicles destined for the UK. Systems that were produced for different countries contain a non-compliant serial number and are not ‘Thatcham Approved’. To find out if your installer is an authorised Clifford car alarms fitter and dealer please see the official UK website.

Clifford Cat 1 Car Alarms

All Clifford 650 Cat 1 car alarms come with two 5-button remotes, where combinations of presses can provide an array of possible functions. (Updated all-black remotes are new for 2018)

Clifford Concept 650 Mk2 G5 Remote Control Functions

Alarm lock / unlock button
Car Alarm Arm / Disarm
Clifford 650 5-button remote
Boot release
Boot Release – Auxiliary output A
Engine remote start
Remote start (if fitted)
Silent arm / disarm
Silent Arm / Disarm
Auxiliary output B
Activate SmartWindows (if fitted)
Auxiliary output C
twice, then
Activate / Deactivate remote valet
twice, then
Disable sensors
twice, then
Safe mode start – for manual vehicles activate autostart mode


These car alarms are fitted with a dual zone proximity sensor, and is a different way of providing security as opposed to the interior ultrasonic sensor type of system. A dual zone proximity sensor gives one bubble destined for the interior of the car, where any disturbance will trigger the alarm, the second bubble is larger than the vehicle and provides a ‘warn away’ chirp if triggered. The sensitivity can be increased or decreased from the remotes, (please see link below for instructions on how to do this).

This Cat 1 device can also have additional features added at the time of installation or later, however all of these additions will cost extra as they either require extra modules or additional time to fit:

The three auxiliary outputs are all capable of timed functions, allowing customers to design a custom security package for their vehicle.

This system also benefits from an amplified antenna, meaning that the remote will work from a further distance than is usual for auto security systems.


* Extra Parts and Labour will incur a reasonable additional charge as some vehicles require extra time for fitting e.g. Nissan Elgrand adds £80 to any alarm system, built motorhomes may need extra installation time, and door motor fitting is charged extra on a per door basis.


Clifford concept 650 mkII remote sensor adjustment.

Concept 650 mkII Owners Guide


View alternative system:

Autowatch 457


We can expertly fit the Clifford Concept 650 Southampton, Basingstoke, Guildford, Chichester and Hampshire areas. This is an ideal Thatcham Car Alarm for your cherished asset.