Although it boasts ultra-small dimensions, the Sennheiser SK 6212 punches well above its weight. This compact bodypack transmitter features an ergonomically optimized design, with a robust metal housing that weighs less than most smartphones. What’s more, it’s moisture- and sweat-resistant — a must for real-world use. You also get 12 hours of continuous operation. Of course, all of these attractive features would be useless if it didn’t sound good. Luckily, the SK 6212 yields superb fidelity and impressive dynamic range, thanks to Sennheiser Digital Audio Codec (SeDAC) and long-range mode — acclaimed features from Sennheiser’s Digital 9000 series.