JZ Microphones BT-201/3 Small Diaphragm Condenser Microphone - electrostatic pressure gradient, transducer, 13mm diaphragm, 20Hz-20kHz, capsules: cardioid, open cardioid and open cardioid -20dB, 50 Ohms output impedance, 1000 Ohms rated load impedance (>250 Ohms suggested), 11mV/Pa (1000Hz into 1000 Ohms), 71dB S/N ratio (CCIR 468-3 weighted), 82dB-A (DIN/IEC 651 A-weighted), 12dB-A equivalent noise level (DIN/IEC A-weighted), 140dB max SPL (0.5% THD at 1000 Ohms), 128dB preamp dynamic range. Requires +48V phantom power (+/-4V) on XLR pins 2 & 3 (current consumption: < 2 mA), gold plated contacts. Dimensions: 161.5 x 24mm diameter. Weight together with magnetically attached head: 140g