AKG WMS40 Mini Dual Vocal Set Wireless Microphone System

AKG WMS40 Mini Dual Vocal Set Wireless Microphone System Battery Chemistry: Alkaline Operating Range: 65.62 ft Signal to Noise Ratio (SNR): 110 dB(A) Operating Range: 65.62 ft Signal to Noise Ratio (SNR): 110 dB(A) Battery Run Time: 30 Hour Battery Run Time: 30 Hour 6.35mm (?1/4"): Yes Battery Size Supported: AA Number of Batteries Supported: 1