The Movo LV4-c Lavalier Cardioid Microphone is a high quality Xlr lavalier microphone. Requires 48V phantom power and works with audio recorders, sound boards, or wireless receivers that take Xlr inputs. The cardioid capsule yields a generous pickup area while maintaining adequate feedback and noise blocking. A wide frequency response and high Spl rating results in full, clear audio reproduction for speech. Cardioid Lavalier Specifications Capsule Size: 6mmFrequency Response: 35-18KHz +/-3dB Max Spl: 120 dB Sensitivity: -38dB +/-3dB / 0dB=1V/Pa, 1kHz Output Impedance: 200 ohms Power Requirement: 48V Phantom Power Signal-to-Noise Ratio: 78 dB Connector: Xlr Cord length: 6-foot