Superlux ECM 888 B, 1/4" condenser measurement microphone, omni-directional, 20 - 20.000 Hz, Sensitivity at 1,000 Hz: 43dBV/Pa (7.1mV/Pa) ±3dB, 800 Ohms, 94 dB SPL, 128 dB max, Equivalent noise level:(A-weighted) 22dB, Signal-to-noise ratio:72 dB, Power supply :4LR44 6V battery, weight 150g, dimensions: 210 x 170 mm, metall housing with champagne paint finish, incl. battery and Shockmount holder