I saw that today looks good but not sure how it will hold after abuse http://www.coptool.com/powerstrike-hammer-the-6-million-dollar-man-of-striking-tools/
There is a Bluetooth one that work with iPhone4, iPod touch and androïde its the ir blue and only 165$ http://www.treehugger.com/gadgets/detect-drafty-windows-your-smartphone.html