Automatic activation when the reverse gear is chosen Car icon and digit showing in LCD display to indicate different distance and orientation of the obstacle English voice alert in 3 stages: attention/ warning/ stop Suitable for 2/ 4/ 6/ 8 sensors, 6 or 8 sensors system, complete front and rear protection 3 installation choices ( dashboard, windshield, and A/ C vent) LCD display can be circumrotated by 360 for optimal view of user Precise detection up to 0.01m All weather design ( -40 to + 80 degree Celsius)