Features:
Adopts a blind spot detection system featuring one transmitting and multi-receiving.
Can operate normally under circumstances of poor visibility (such as rain, fog, night).
Independent action system with no need to connect OBD and does not affect .
Installed on both sides of the back bumper to ensure invisibility.
Four-in-one function: blind spot detection warning)BSD), lane change alert)LCA), rear cross traffic alert)RCTA), door opening warning.
After starting the vehicle, BSD system would start-up.
LED light will turn on when there is vehicle in blind spot.
LED light will blink and the buzzer will alarm when the turn light is on and there is vehicle in blind spot.

Specification:
Condition: 100% brand new
Material: ABS + LED + glass
Detection Range Accuracy: 0.1M
Maximum Detection Range: 15M
Warning Range: 3-15M
System Warning Accuracy: 0.1M
Warning Method: Sound light
IP Rating: IP67
Warning Time: Minimum warning reaction time 0.75sec
Rated current: 130ma±50ma
Working Voltage: 12V-24V
Working Frequency: 24GHz-24.25GHZ
Level Angle: Frequency emission 42*80
Speed Range: -20m/s~20m/s, 72M
Working Temperature: -45°C~85°C
Storage Temperature: -45°C~85°C
Package Weight: 2253g/79.5oz
Fitment: for B9 2017-2018

Package list:
1 * Blind Spot Detection System
1 * Pair of Blind Spot Mirror(Blue LED) for B9