OOONO CO-DRIVER NO2 Plus traffic warning device The OOONO CO-DRIVER NO2 Plus is a modern traffic warning device that supports drivers on the road with precise, up-to-date warnings. It provides real-time information about speed cameras, danger zones, speed limits and other relevant events by connecting to a smartphone via Bluetooth and using data from a large community database. With integration with Apple CarPlay and Android Auto, a rechargeable power supply and a practical holder for the sun visor, the CO-DRIVER NO2 Plus offers improved use in everyday driving.