The Sennheiser XS Wireless 2-CI1 is an easy-to-use all-in-one mic set. Even though it's a breeze to use, a plethora of useful options are available via the XSW 2-CI1's LCD display. True diversity and 12 compatible channels ensure smooth operation, even under tough live stage conditions. And setup is a snap, thanks to automatic frequency management and remote synchronisation. This set includes Sennheiser's popular Ci1 instrument cable — the perfect choice for guitarists who want an untethered onstage experience. The receiver's metal housing and the bodypack's sweat-resistant design make the XSW 2-CI1 a durable, gig-ready wireless system.

Wireless instrument set. Includes (1) SK-XSW bodypack transmitter, (1) CI 1 instrument cable, (1) EM-XSW 2 true diversity receiver, (1) NT 12-5 CW power supply and (1) GA 1 XSW 2 rack-mount, frequency range: BC (670-694 MHz).

Choose the Wireless Frequency correctly 

> Wireless Audio Devices Guide - by Department of Infrastructure of Australian Government
https://www.communications.gov.au/what-we-do/spectrum/wireless-audio-devices

> ACMA's Channel Finder - to check what is available in your area
https://channelfinder.acma.gov.au/

> Sennheiser frequency Calculator - to find the best frequency to use in your area
http://www.frequencyfinder.com.au/