Line the inside of your helmet with tinfoil - I find that helps. 
Short of fitting a bigger antenna I can't see how you'd up the wireless range. I doubt you'd be able to just up the signal strength without altering the original device significantly.
Try Dick Smith.
It is preferential to refrain from the utilisation of grandiose verbiage in the circumstance that your intellectualisation can be expressed using comparatively simplistic lexicological entities. (...such as the word fuck.)
Remember your humanity, and forget the rest. - Joseph Rotblat
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