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 TWR-K70F120M is a development board for the Kinetis® K61 and K70 families 32-bit Arm® Cortex®-M4 MCUs. The TWR-K70F120M operates as a standalone debug tool and can also be combined and used as part of the modular Tower® System development platform.