Lexus RX 450h 2012 Owner's Manual page 261

2-4. Using other driving systems
■
Rear center sensors
Detection
level
1
2
3
4
260
Multi-information
display
Approximate dis-
tance to obstacle
4. 9 to 2.0 ft.
(150 to 60 cm)
2.0 to 1.5 ft.
(60 to 45 cm)
1.5 to 1.2 ft.
(45 to 35 cm)
1.2 ft. (35 cm) or
less
Buzzer
Slow
Medium
Fast
Continuous