Shure WH20 Headset Microphone 100812758 Bandpass Nominal Impedance: LF: 2

Bandpass Nominal Impedance: LF: 2 x 2 ohms LF Driver: 1 x JBL 2268FF 457 mm (18 in) dual voice coil Differential Drive® woofer with neodymium-magnet

And at 750 watts

Illuminance (w/Medium Lens): 2

Grille: steel

meeting the criteria for a Class B rating

Shure WH20 Headset Microphone 100812758 Bandpass Nominal Impedance: LF: 2Shure WH20 Dynamic Headset Microphone The Shure Model WH20QTR is a rugged, lightweight, dynamic headset microphone that provides high quality voice pickup. It fits securely for active microphone users, such as aerobics instructors and musicians, with low visibility for stage appearances. The WH20 is suitable for any voice communications application where comfort and reliability are required. The WH20QTR has a cardioid (unidirectional) pickup pattern.