Sennheiser SKM 825-XSW-E-Band, UHF Handheld Transmitter, For XSW1 and XSW2 wireless systems, Frequency range: E band: 823 - 832 MHz and 863 - 865 MHz, Dynamic E825 capsule, Directional characteristic: Cardioid, Operates on 2 AA batteries, Microphone holder MZQ1 included