A new tool for designing embedded systems combines ultra-low-power MSP430 microcontrollers (MCU) with wireless communications, making it easier to develop low-power wireless systems. At just $49, the new eZ430-RF2500 development tool, packaged in a convenient USB stick form factor, offers two radio-frequency (RF)-enabled MCU target boards and a PC debugging interface that may be used to develop stand-alone wireless projects. Developers will now find it easier than ever to build low-power wireless systems for sensing and metering, home security and automation, medical, and other innovative applications. The unit builds on the success of the eZ430-F2013 development tool, introduced in early 2006. It opens up new possibilities for low-power designs combined with wireless communications. Backward-compatible with the F20xx target boards, which have been sold separately since late 2006, the eZ430-RF2500 provides continuity for enhancing existing designs.