Sennheiser Wireless 2-Channel Vocal Set - XSW 1-825The XSW 1 825 Dual Vocal Set with Two 825 Handheld Microphones from Sennheiser includes an EM XSW 1 dual stationary receiver with internal antennas, two SKM XSW transmitters with mute switches, two MZQ 1 microphone clips, an NT 12 5 CW power supply, and four AA batteries. The analog UHF dual channel wireless system can be used in several applications for singers, presenters, DJs, churches, and schools. Designed with ease of use in mind, the XSW 1 Dual