Extremely small, omnidirectional professional lavalier microphone for theatre, house-of-worship and broadcast applications. It features the patented dual-diaphragm capsule, which has been designed to protect the transducer from moisture, salt and perspiration. It uses two vertical diaphragms mounted back to back to cancel out mechanical and cable noise by mixing the signals of both capsules out of phase. The screw-on module capsule allows quick and easy service of the microphone. Audio frequency bandwidth: 20 Hz-20 kHz. Equivalent noise level: 37 dB/Pa. Sensitivity: 8 mV/Pa. Signal-to-noise: 68 dB-A. Dimensions: 14 x 5.5 mm. Weight: 0.4 g.