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Clifford Concept300, the remote extender unit packed up and wouldnt let me in the car. I didnt know the valet code as I never needed to scince valet is done from the remote(when its works.!) so I was stuck.
Other than that good.

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Anti-car jacking, loud, reliable, interior lights come on, central locking, central windows, sensitivity adjustment from remote, coded rocker switch for programming/entering valet mode.
The alarm NEVER falses, has glass and shock sensor, siren can be programmed for different sounds, not like the typical "6 different tones one after the other" that everyone else has.

Had problems with remote range, unit was serviced under warranty and since seems to be OK.

Paid $400 for the unit, too much, but the whole package is nearly impossible to beat. I have yet to find alarm that is so feature packed and reliable. Am interested to see what Clifford's new products are as this one is already pretty old.

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first and only alarm.