<p>➀ SparkFun Electronics will manufacture the Teensy 4.0 and 4.1 Cortex-M7 development boards; </p><p>➁ The boards offer a powerful processor and Arduino compatibility; </p><p>➂ PJRC and SparkFun have a collaborative relationship, with SparkFun handling manufacturing and sales, allowing PJRC to focus on software development.</p>