Less wires. More freedom. The AKG WMS45 Perception Wireless Instrument Set is wire-free and stage-ready. The WMS45 is completely user-intuitive. Giving you professional audio with none of the complications. Just plug and play. Incredibly compact. The included PT45 transmitter is the smallest of its class. Meaning youre free to roam the stage without being weighed down. A built-in Squelch circuit guards you from unwanted noise and interference. And with eight hours of use from a single AA battery you can last the whole performance.