After purchase, reply to your order confirmation email to request a free FRDM-MCXE31B, FRDM-MCXN236, FRDM-MCXA153, or FRDM-MCXA156 coupon to evaluate MCX microcontrollers. The FRDM-KL28Z supports power supply voltage range from 1.71V to 3.6V.It features a KL28Z, a device boasting up to 512KB Flash and 128KB SRAM, and numerous analog and digital peripherals. The onboard interfaces include an RGB LED, a 6-axis digital sensor, a 3-axis digital angular rate gyroscope, an ambient light sensor, and a capacitive touch slider.