Sennheiser XSW 1-835 DUAL-A Wireless Dual Vocal Microphone Set

Sennheiser Wireless Microphone System Microphone Technology: Dynamic Battery Run Time: 10 Hour Battery Run Time: 10 Hour 6.35mm (?1/4"): Yes Battery Size Supported: AA XLR: Yes Maximum Operating Frequency: 572 MHz Number of Batteries Supported: 2 Maximum Frequency Response: 16 kHz Minimum Frequency Response: 55 Hz