ACCEL DFI 77062S Single Channel Wide Band O2 Kit with Gauge Features DataMap software that can monitor or record your air fuel ratio engine rpm and vehicle speed for EFI or carburetor standalone applications Onboard data logger can electronically record multiple files at up to 250 samples per second without the use of a laptop Includes a digital guage Able to trigger external devices using rpm vehicle speed air fuel ratio settings and any auxiliary input line such as a transbrake or line loc Comes with a user configurable air fuel alarm that will kill the ignition or the fuel pump if the air fuel ratio reaches a level that could hurt the engine