... parking sensor: 1. "BiBi" audible warning 2. 6 sensors, 2 at front, 4 at rear 3. High quality and easy to install Speech parking sensor ... any other language is available - For front detect, it will posepone to work 10 ... 6 sensors, 4 for rear detect, 2 for front - Heavy rain-proof & All weather design - ... - Warning: 80dB - Full-range technical support Front and back Buzzer speech parking sensor(BB-02-6)