here's the write up on it
AEM’s Wideband UEGO Controller is also available in a gauge that includes a single-channel analog output with a Bosch O2 sensor in one unit! AEM’s Gauge-Type Wideband UEGO Controller features an LED readout and sweeping LED “needle” that changes colors as AFR changes from rich to lean. 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! Key Features: Bosch sensor included! 24 Color-coded LED display lights provide immediate reference to engine’s air/fuel ratio (AFR) or Lambda Integrated three-digit display reveals AFR or Lambda in real time User-programmable 0-5v analog output included for use with data loggers and ANY engine management system Ideal AFR monitoring tool for carbureted applications and engine dynamometers. Does not oscillate AFR like narrow band sensors.(RS 232)Accurate to 0.1 AFR