2 warning LED displays are fitted inside by your left and right door mirrors. In normal driving, when a vehicle enters within 3 metres of your blind spot on your left or right, an LED lights to show that a vehicle is present.

If you then indicate to move into the hidden vehicles path, the LED will flash and an audible buzzer sounds warning you not to move.
It's as simple as that !

      •  Monitor the side rear blind spots
      •  See & hear alerts if another vehicle is within 3 metres
      •  Helps with lane changes, in fog, night-time, rain or snow
      •  GPS speed sensor  
      •   Ignores obstacles approached from the front

   blind spot monitoring

Unlike other systems that may be available, Mongoose blind spot monitors have 4 sensors. 2 are fitted to the sides at the front and 2 to the sides at the rear.
The front pair prevent false alerts from obstacles being approached, such as cars going the other way – pedestrians – lamp posts – roadworks - rubbish bins - parked cars etc.
Basically anything that you approach from the front does not cause an alert.
2 sensor systems cannot do this so are subject to false alerts. 
It’s objects coming from behind - the ones that you can't see -  that are detected. 

The system monitors GPS satellites to calculate your vehicle's speed. 
The blind spot system is programmed not to opertate at speeds below 20km/h. (+/- 25%)
This is to avoid false alerts, for example, at traffic lights, in slow traffic or in traffic jams.                       

The standard push-in type are inserted into a holes drilled into your bumpers or bodywork.
They are manufactured in black but can be painted to colour match your vehicle.
You just need to provide your installer with the colour code from your vehicles ID plate to get a perfect match.

We also have available alternative sensor heads suitable for angled bumpers;

MBSW0       - 0 degress
MBSW7       - 7 degree angle - vertical alignment
MBSW13     - 13 degree angle - vertical alignment
MBSWAKIT - 4 sensors 2 rear with fixed 13 degree side angle and 2 with adjustable verticle angle rings, 0,7 & 13 degrees
These are standard fitting and are inserted from the front.
Sensor detection range is 3 metres.