The product has two kinds of packages, one is display + host + sensorOne is sensorFeatures:- Humanity design andEnglish voicenotification for distance of obstacle-22mm 4 sensorsbackup parking system, double CPU and advanced chip for enhanced coverage and detection- Green, yellow and red 3 color,7 segment LED lightsindicate obstacle distance- Detective range:30cm to 250cm, cm level display precision, accurately display obstacle distance- The appearance of sensor and body of vehicle is a perfect match, just like original binding acceories- Abnormal state sensor self-checking and prompt function, to avoid the back-draft collision caused by sensor damage- Anti-freeze and rain proof, easy to install with hole saw-Operating voltage: DC12V-Working current: 50 - 150mA-Operating temperature: -40 - 80 Deg.C-Ultrasonic frequency: 40KHz + / - 1KHz-2.5mlength cable, convenient to useDetection Mode:Radar Signal DetectionSpecial features:Led DisplayPackage weight:0.489 kgPackage Size(L x W x H):17.00 x 12.00 x 5.00 cm / 6.69 x 4.72 x 1.97 inchesPackage Contents:1 x Main Control Box, 1 x LED Display, 4 x Parking Sensor, 1x Power Cable, 1 x Hole Saw, 1 x English User Manual, 2 x StickerThe product has two kinds of packages, one is display + host + sensorOne is sensor