The SENNHEISER's XSW 1835 is a wireless microphone system that includes single fixed receiver with inbuilt antennas, SKM XSW transmitters with mute switches, MZQ 1 microphone clips, an NT 12-5 CW power source, and AA batteries.The XSW 1 single-Vocal Set is designed with convenience of use in mind, with automatic frequency management and synchronisation via remote channel for quick setup. It also comes with up to ten channels that are compatible.