WIRELESS SYSTEM: RCEP R41 WLESS INTERCHANGEABLE MICROPHONE, B60 PACKAGE MICROPHONE WITH HT7 BEIS. R41 DIVERSITY RECEIVER WIRELESS MICROPHONE SYSTEM, B60 BODYPACK WITH HT7 HEADSET MICROPHONE A professional diversity wireless system with the HT7 miniaturized single-ear head condenser microphone. HT7 is a professional single-ear condenser microphone designed for stage, presentation and broadcast applications. With a miniaturized element of just 3 mm, the HT7 is the smallest microphone in the Audix line. The omnidirectional HT7 features a comfortable earcup that can be worn around the left or right ear and a durable, adjustable-length boom arm.