The Sennheiser XSW 1-835 bundles great sound and ease of use into a sleek handheld wireless system. The transmitter employs an 835 cardioid capsule with a warm, smooth sound, excellent feedback rejection, and superior SPL handling. Convenient features like one-button scanning and synchronization are housed in a streamlined receiver with built-in antennas. Intuitive icon-based indicators make operation a piece of cake. Use up to 10 systems simultaneously. The Sennheiser XSW 1-835 is a great handheld wireless system for singers, presenters, and instrumentalists.

Complete Vocal system : (1) SKM 835 XSW handheld transmitter with 835 superior cardioid dynamic capsule (1) EM XSW1 mains powered receiver (1) plug pack power supply (2) antennae (2) AA batteries, frequency range: B (614 - 638 MHz)

• Excellent live sound featuring Sennheiser’s renowned evolution microphone capsules
• Automatic frequency management and synchronization via remote channel for easy setup
• Up to 10 compatible channels
• Excellent live sound featuring Sennheiser’s renowned evolution microphone capsules (e835)
• Antenna-switching diversity reception
• Integrated antennas
• Automatic frequency management and synchronization via remote channel for easy setup
• Selectable UHF frequencies within a large bandwidth
• Up to 10 compatible channels

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/