The Stealth 1 by Alto Professional turns any dynamic microphone with an XLR connection into a wireless microphone.  With a range of up to 100+ft (line of sight), you have the freedom to roam cable-free. With 16 selectable UHF channels, you can avoid pesky interference. And with unlimited running time via USB and 4+ hours of running time using a single AA battery you can count on Stealth 1 to last through your entire set.

You can read more about the Stealth 1 here: Alto Professional - Stealth 1