The 30-0300 X-Series model is the brands most highly rated wideband gauge available. Compared to cheaper alternatives, it has a faster response time for improved feedback control.

The brand state that it is the fastest responding controller compared to 17 other UEGO controller in an independent study.

Other features of the AEM 30-0300 X-Series include:

• Uses a Bosch LSU 4.9 sensor
• 8-20 AFR range
• Black face with green LEDs
• Includes all hardware in the box
• Requires no calibration
• 52 mm housing
• 0-5V and RS232 output for data logging