Small and exquisite, that's MD-Pico.

 MD-Pico is a matchbox-sized display designed for MD-Lambda-View. When switched on, it connects automatically to MD-Lambda-View. MD-Pico has an SD card slot and continuously writes the lambda value, engine speed, throttle position (or carburetor slide position), and battery voltage to an SD card when inserted, displaying these values on a compact AMOLED screen. MD-Pico also features an integrated battery that lasts up to two hours, sufficient for an extended test drive. For those needing more power, MD-Pico can be powered via a USB-C port.