







🚦 Stay ahead of danger—never miss a blind spot again!
The BY-J Car Blind Spot Monitoring System Kit uses a cutting-edge 24GHz millimeter wave radar sensor to detect moving objects in your vehicle’s blind spots up to 98 feet away. Designed for cars with plastic bumpers, it provides real-time LED and buzzer alerts to enhance lane changing, parking, and reversing safety in all weather conditions. Featuring four key assistance functions, this universal system is a must-have upgrade for proactive drivers seeking next-level road awareness.









| Item Weight | 2 pounds |
| Product Dimensions | 9.45 x 6.7 x 3.94 inches |
| Display Type | LED |
O**Z
Excelente producto
Tanto de noche hasta con lluvia funciona muy bien
J**Y
My experience so far is that it’s not a reliable system
I’m sharing my experience so far. The system is not consistent in its detection of cars and trucks. It detects car about 80% of the time and trucks (track trailer) about 10% to 20% of the time. So far, I can’t rely on its results to make a safe lane change.
F**G
Great picture
Easy installation
E**E
Really hard to get right
My mechanic dad couldn’t get these to detect consistently. It lights up before or after, not when someone is actually in the blind spot. Sort of a waste of money.
Trustpilot
5 days ago
3 days ago