Editorial Review:Product Description:COBRA XRS 9840 ULTRA PERFORMANCE 12 BAND(R) RADAR/LASER DETECTOR DETECTS THE LATEST RADAR GUN POP;DETECTS EUROPEAN KUBAND RADAR GUN ; RELATIVE SPEED SENSING AUTO MUTE SYSTEM VIRTUALLY ELIMINATES FALSE ALLERTS;INTELLISHEILD(R) REDUCES THE FREQUENCY OF FALSING IN DENSELY POPULATED URBAN AREAS; 8-POINT ELECTRONIC COMPASS AUTOMATICALLY PROVIDES AN ACCURATE ELECTRONIC DIRECTION READING;12-BAND(R) DETECTION;WORKS WITH EMERGENCY VEHICLES CURRENTLY EQUIPPED WITH TRAFFIC LIGHT CONTROLLING STROBE EMITTERS;LASEREYE(R) PROVIDES 360deg DETECTION OF LASER SIGNALS;SAFETY ALERT(R) FEATURE WARNS DRIVERS OF EMERGENCY VEHICLES and ROAD HAZARDS FROM SYSTEMS EQUIPPED WITH SAFETY ALERT(R) TRANSMITTERS;SMARTPOWER(TM) AUTOMATICALLY SHUTS OFF POWER TO THE UNIT WHEN THE IGNITION IS TURNED OFF; VOICE ALERT(TM) PROVIDES THE USER WITH SPECIFIC BAND VOICE ANNUNCIATION;VG-2 ALERT(R) and SPECTRE ALERT(TM) NOTIFY THE USER OF SURVEILLANCE OF VG-2 RADAR DETECTORS;VG-2 UNDETECTABLE PROVIDES COMPLETE IMMUNITY TO VG-2 RADAR DETECTORS;ULTRABRIGHT DATA DISPLAY(TM) PROVIDES RECOGNITION OF BAND DETECTED BY USE OF BAND IDENTIFICATION ICONS;CITY and HIGHWAY MODES REDUCE THE FREQUENCY OF FALSING IN DENSELY POPULATED URBAN AREAS;AUTO MUTE AUTOMATICALLY MUTES THE ALERT TONE FOR ENHANCED DRIVER CONVENIENCE;DIM MODE ALLOWS THE USER TO DIM THE RADAR DETECTOR DISPLAY ENHANCING NIGHT DRIVING VISIBILITY;STAYSET(R) ELECTRONIC MEMORY REMEMBERS RADAR DETECTOR SETTINGS FOR AN INDEFINITE PERIOD OF TIME EVEN WITH THE POWER REMOVED;CAR BAT
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Customer Reviews
Average Rating:
-
Does what it was designed to do ....
I took a recent 400 mile trip in to West Virginia from Virginia and this unit alerted me several times ... with enough time for me to check my speed and adjust accordingly. I picked up a moving police car coming up on my rear several minutes before the police car caught up with and passed me. So, in my opinion, for the money, it's a good unit. TWO things I do not like: I'd like to have a visor mount and I'd like to have a straight, fairly long power cord. For this reason I give the detector a 4.
Rating: 
-
WOULD NOT RECOMMEND.
I purchased my Cobra XRS-9840 a few weeks ago and had high hopes because of the great price. I was very disappointed after using it for several days, it didn't work at all.
1) The sticky velcro was a horrible idea. It fell off 100 times after strategically placing it in different areas of my windshield.
2) The screen is tiny. I do like the blue LED on the black screen but I don't like that the detector is so big and bulky and the screen is small.
3) I programmed it correctly and it still barely picked up anything. When it did pick something up, it was a grocery store or drug store, NOT ONCE did it pick up a patrol car.
Complete waste of money.
My advice : Go with a Beltronics. This is what I have now and for almost the same price it is much better quality.
Rating: 
-
Good unit, better out there for the price.
The Cobra 9840 has plenty of features that are good. The only major problem is the lack of radar sensitivity. Not close in comparision of other brands of units such as the Whistler pro 78 or xtr 690. Both are within the price range of the Cobra while offer much better performance and detection range. Check out the others before buying the Cobra brand.
