Sony ECM-ZS90 Microphone. Microphone frequency: 80 - 18000 Hz, Microphone operation mode: Uni-directional. Connectivity technology: Wired, Cable length: 1.5 m. Battery type: CR20, Battery life (max): 150 h. Dimensions (WxDxH): 121 x 36 x 83 mm, Weight: 63 g