Speech parking sensor: 1. "BiBi" audible warning 2. 6 sensors, 2 at front, 4 at rear 3. High quality and ... 10 seconds after braking - 6 sensors, 4 for rear detect, 2 for front - Heavy rain-proof & All weather design - High ... 28V DC - Rated current: 10mA ~ 150mA - Detection distance: 0.3 ~ 2.5m for rear / 0.3 ~ 1.2m for front (can ... support Front and back Buzzer speech parking sensor(BB-02-6)