Lexus 2012 RX450h Owner's Manual page 314

2-4. Using other driving systems
■
Rear center sensors
Detection
level
1
2
3
4
314
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