Step right up folks and check out the freak show, in cage #1 we have the 2.1mm Barrel socket with rocker wwitch! Who would have thought such a combination existed? Yet, it seems almost beautiful in it's design.
Come see yet another freak of nature, a combination 2.1mm Barrel Jack plus Slide Switch in one! And like all freakishly weird creatures, it is strong as an ox! Rated at 3A (@16VDC) this mini behemoth can take on all you can throw at it (well there are limits, but we're just sayin' it's awesome)!
Looking for 802.15.4 Zigbee-like device with smarts? XBee with more features? Check out Synapse modules! Small, low-power, 2.4 GHz plug-in transmitter-receiver modules, with an extended range up to three miles and power consumption as low as 2.5uA.
A great introduction to starting out with Radio Frequency (RF) Networking. Use your computer to control a remote application or have the application control the computer. This bundle + guide will get you up and running with RF networking in a practical way.