161B is a car data logger that can get the status of vehicle data and driving behavior data and output the recorded data to external Bluetooth device through Bluetooth. Among them, the vehicle data status includes important data such as odometer mileage, total driving hours, total fuel consumption, fuel level, vehicle speed, speed, coolant temperature, voltage, vehicle VIN code, fault code, ignition status, Based on the specific vehicle, Some of the data may not be available or will be able to obtain more data. Driving behavior data includes static or moving vehicles, rapid acceleration, rapid deceleration, sharp turns, trailers, collision trajectory and so on.