AEM's Wideband Analog 52mm o2 gauge includes a single-channel analog output with a Bosch O2 sensor in one unit! AEM's Wideband Analog 52mm o2 gauge controller features an analog sweeping needle and seven user adjustable backlight colors. Each gauge includes one silver and one black bezel and also a black and white interchangeable faceplate. The unit's 52mm (2-1/16") gauge housing fits in most gauge pods and can be remotely mounted virtually anywhere. No laptop required for monitoring!