Sennheiser MM 435, Dynamic Microphone Capsule, Polar pattern: Cardioid, Frequency range: 40 - 20.000 Hz, Max. SPL: 163 dB, Impedance: 245 Ohm, Open circuit sensitivity: -54.9 dBV/Pa (1.8 mV), Spring-mounted capsule for shielding from structure-borne sound, Dimensions (length x diameter): 181 x 47.5 mm, Weight: 350 g@+*Compatible with:*@+@+, Digital 6000, Digital 9000, 2000 Series, Evolution Wireless G4@+*Not compatible with:*@+@+, XS Wireless, 5000 Series, AVX, SpeechLine DW, Evolution Wireless G3