i just bought a new Cobra XRS 999 - 15 Band Maximum Performance Digital Radar/Laser Detector for 30 dollar from my buddy...

Radar:
http://cobra.com/products/radar-dete...fix-ii-display

the problem is... it keep on detecting K alert in front of my house in my 96 civic coupe so i decided to drive around the block, still doing the same thing.... i try in 3 other car (in front of house) it didnt detect anything (havent drive around the block).... any help?