The new Haltech Haltuner Wideband + Gauge, now uses a Bosch 5-Wire O2 Sensor for greater acuracy in tuning. Bosch 5 Wire O2 Sensor Included.  An extra sensor can be used on the second channel for use in Vee and boxer engines. 

It currently displays Air Fuel Ratio in the latest version of the Haltech Halwin Software for E8 and E11. 

Haltech’s Wideband Display Gauge displays Air Fuel Ratio (AFR) down to 0.1 accuracy through a 21 colour LED sweeping needle display for immediate reference to engine AFR. An integrated three-digit digital real-time display is also a key feature in the Haltech Wideband display gauge.

The slim line design of the Haltech Wideband Display Gauge (only 3/4" or 18mm thick) allows this unit to mount well in surface mount configurations, the Haltech Wideband Display Gauge also fits neatly into standard 52mm (2-1/16") gauge pods.