No. The California Vehicle Code states:

VEHICLE CODE
SECTION 28150

28150.  (a) No vehicle shall be equipped with any device that is
designed for, or is capable of, jamming, scrambling, neutralizing,
disabling, or otherwise interfering with radar, laser, or any other
electronic device used by a law enforcement agency to measure the
speed of moving objects.
   (b) No person shall use, buy, possess, manufacture, sell, or
otherwise distribute any device that is designed for jamming,
scrambling, neutralizing, disabling, or otherwise interfering with
radar, laser, or any other electronic device used by a law
enforcement agency to measure the speed of moving objects.
   (c) Except as provided in subdivision (d), a violation of
subdivision (a) or (b) is an infraction.
   (d) When a person possesses four or more devices in violation of
subdivision (b), the person is guilty of a misdemeanor.
   (e) Notwithstanding any other provision of law, a person who has a
valid federal license for operating the devices described in this
section may transport one or more of those devices if the license is
carried in the vehicle transporting the device at all times when the
device is being transported.

Not all states have this restriction, however. Check your state's vehicle code for more information.