Download BOYA Sound App from Playstore and Apple store Omni-directional condenser microphone excellent for interviews dual-lavalier microphone Improved sensitivity and signal-to-noise includes carrying pouch & Cleaning Cloth transducer: electret condenser polar pattern: omni-directional frequency range: 65hz ~ 18khz signal / noise: 74db spl sensitivity: -30db +/- 3db / 0db=1v/pa, 1khz output impedance: 1000 ohm or less connector: 3.5mm (1/8”) 4-pole gold plug power requirement: lr44 (included) Power source type: Battery Powered