The 635N/D-B has the same hammer-like toughness and classic performance and reputation as the 635A with the added benefit of increased output from its neodymium magnet structure.
Case Material        Steel
Connector Type        3-pin XLR
Diameter (Max)        36 mm (1.42")
Element        Dynamic
Finish        Non-reflective black
Frequency Response        80 - 13,000 Hz
Impedance, Low-Z balanced        150 O
Mic Type        Handheld
Open Circuit Voltage        2.8 mV/Pascal
Polar Pattern        Omni
Power Requirement        Passive
Wired/Wireless        Wired
Height        151 mm (5.94")
Weight Net        6 oz (170 g)