---
product_id: 542919713
title: "BY-J Car Blind Spot Monitoring System Kit, 24GHz Millimeter Wave Radar Sensor Blind Area Detection System, Universal Car SUVs Trucks RVs Lane Changing Warning with Reversing Radar Parking System"
brand: "by-j"
price: "€ 303.19"
currency: EUR
in_stock: true
reviews_count: 3
category: "By J"
url: https://www.desertcart.sk/products/542919713-by-j-car-blind-spot-monitoring-system-kit-24ghz-millimeter
store_origin: SK
region: Slovakia
---

# 24GHz millimeter wave radar LED + buzzer alert system 98ft detection range BY-J Car Blind Spot Monitoring System Kit, 24GHz Millimeter Wave Radar Sensor Blind Area Detection System, Universal Car SUVs Trucks RVs Lane Changing Warning with Reversing Radar Parking System

**Brand:** by-j
**Price:** € 303.19
**Availability:** ✅ In Stock

## Summary

> 🚦 Drive smarter, safer, and ahead of the curve with BY-J’s radar tech!

## Quick Answers

- **What is this?** BY-J Car Blind Spot Monitoring System Kit, 24GHz Millimeter Wave Radar Sensor Blind Area Detection System, Universal Car SUVs Trucks RVs Lane Changing Warning with Reversing Radar Parking System by by-j
- **How much does it cost?** € 303.19 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/542919713-by-j-car-blind-spot-monitoring-system-kit-24ghz-millimeter)

## Best For

- by-j enthusiasts

## Why This Product

- Trusted by-j brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Smart Moving Object Alerts:** No false alarms from stationary objects—only real-time threats trigger warnings.
- • **All-Weather Safety Assurance:** Reliable LED and buzzer alerts in rain, fog, snow, or night driving conditions.
- • **Precision 24GHz Radar Sensor:** Cutting-edge millimeter wave tech for ultra-sensitive blind spot detection.
- • **Extended 98ft Detection Range:** Spot moving vehicles and pedestrians well before they enter your blind zone.
- • **Multi-Function Driver Assistance:** Includes Blind Spot Detection, Lane Change Assist, Open Door Warning, and Rear Cross Traffic Alert.

## Overview

The BY-J Car Blind Spot Monitoring System uses advanced 24GHz millimeter wave radar to detect moving objects within a 98ft range, providing real-time LED and buzzer alerts to enhance lane changing and parking safety. Designed for plastic bumper vehicles, it integrates four key driver assistance features—BSD, LCA, DOW, and RCTA—ensuring comprehensive blind spot and rear cross traffic awareness in all weather conditions.

## Description

How Blind Spot Dections System work? 1, This blind spot monitoring can distinguish between stationary and moving objects. Fixed objects do not alarm, but when moving vehicles, pedestrians, bicycles and motorcycles are detected, there will be an alarm. 2, Detectable Lateral Distance: 26ft Lateral Lateral and Distance: 98ft, auxiliary functions: (RCTA) reversing warning, (LCA) intelligent lane change assist, detect vehicles driving at the same speed in the blind area, and facilitate the understanding of vehicles at the same speed in advance case. 3, The rear car is stationary after parking, and the blind spot will not alarm. When the rear car is slower than us, there is no danger of collision, and the alarm will not be issued. Similarly, when we overtake, the speed is faster than the rear car, and the alarm will not be issued. 4, During driving, when the side/rear vehicle is in danger of collision with our vehicle, the LED light will light up to remind the driver; if the left/right turn signal is turned on, it will also be accompanied by an audible warning.

Review: As simple as they come... - My biggest complaint with the system is that there's almost no documentation, just one tiny pamphlet that doesn't even completely match the product. Fortunately the system is so simple I was able to figure out how to install it with the help of various online videos installing similar BSD systems. I was working by myself so the install took a couple of days. The hardest part was figuring out how to connect the system to a switched 12v power supply. I opted for a "add-a-circuit" fuse tap that I got a local hardware store. Although the system is simple in design, there are lots of steps involved, including removing the back bumper cover. However, as long as you are patient and tackle each part of the install carefully, the end result will be worth. With limited testing so far, the system works exactly as I had hoped.
Review: No instructions - No instructions.

## Features

- This radar blind spot detectors system is a vehicle assistance device that helps driver lane changing safely during driving.
- ★Adopting the most sensitive 24GHZ millimeter wave radar sensor, Detects whether a moving object enters the blind spot of the detection range on the side/rear of the vehicle.
- ★【Distinguish fixed or moving object alarm】Fixed objects do not give an alarm, while cars, pedestrians, bicycles, motorcycles, etc. in motion will give an alarm when detected.
- ★【Long Detecting Distance】When the system is on, the system would start detecting moving objectsobjects in the blind area behind the vehicle 11.5*98 ft.
- ★【Warning Alarm Function】No matter it's night time, in rain, in fog or even in the snow,, Whenever a moving object suddenly enters the detection range, the LED flashes and the buzzer sounds to remind the driver.
- ★【4 Assistance Features】BSD - Blind Spot Detection; LCA - Lane change assistance; DOW - Open door warning; RCTA - Rear Cross Traffic Alert; Help drivers avoid the side crash accident more effectively.
- ★【IMPORTANT】Can install on cars with a plastic bumper only, not work with vehicles with a metal bumper as metal bumper will interference with the radar sensor. This item fits for most DC12v sedan, compact, SUV, MPVs, pickup etc and professional audio installer installation is required.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09VDNL691 |
| Band frequency supported | 24 GHz |
| Best Sellers Rank | #115,610 in Electronics ( See Top 100 in Electronics ) #38 in Radar Detectors |
| Brand | BY-J |
| Compatible Devices | Car |
| Compatible devices | Car |
| Customer Reviews | 3.3 out of 5 stars 9 Reviews |
| Display Type | LED |
| Display type | LED |
| Frequency Bands Supported | 24 GHz |
| Item Dimensions L x W x H | 24L x 17W x 10H centimeters |
| Manufacturer | BY-J |
| Power Source | Corded Electric |
| Power source | Corded Electric |
| UPC | 739722614522 |
| Voltage | 12 Volts |

## Product Details

- **Brand:** BY-J
- **Compatible devices:** Car
- **Band frequency supported:** 24 GHz
- **Power source:** Corded Electric
- **Display type:** LED

## Images

![BY-J Car Blind Spot Monitoring System Kit, 24GHz Millimeter Wave Radar Sensor Blind Area Detection System, Universal Car SUVs Trucks RVs Lane Changing Warning with Reversing Radar Parking System - Image 1](https://m.media-amazon.com/images/I/71S7VoEM90L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐ As simple as they come...
*by P***E on 25 September 2025*

My biggest complaint with the system is that there's almost no documentation, just one tiny pamphlet that doesn't even completely match the product. Fortunately the system is so simple I was able to figure out how to install it with the help of various online videos installing similar BSD systems. I was working by myself so the install took a couple of days. The hardest part was figuring out how to connect the system to a switched 12v power supply. I opted for a "add-a-circuit" fuse tap that I got a local hardware store. Although the system is simple in design, there are lots of steps involved, including removing the back bumper cover. However, as long as you are patient and tackle each part of the install carefully, the end result will be worth. With limited testing so far, the system works exactly as I had hoped.

### ⭐ No instructions
*by J***1 on 14 September 2025*

No instructions.

### ⭐⭐⭐⭐⭐ Excelente producto
*by O***Z on 5 December 2024*

Tanto de noche hasta con lluvia funciona muy bien

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**Shop now:** [https://www.desertcart.sk/products/542919713-by-j-car-blind-spot-monitoring-system-kit-24ghz-millimeter](https://www.desertcart.sk/products/542919713-by-j-car-blind-spot-monitoring-system-kit-24ghz-millimeter)

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*Product available on Desertcart Slovakia*
*Store origin: SK*
*Last updated: 2026-02-05*