Handheld Microphone Boom for M-216 Transmitter The HH-185 microphone boom allows the standard M-216 microphone transmitter to be used as a handheld wireless microphone. It may be passed around in a group setting or held and pointed in the direction of the desired sound source. The gain control on the M-216 transmitter allows the user to adjust the sensitivity of the microphone. The HH-185 boom incorporates a unique integral antenna design so that no external antenna is required while still maintaining the maximum transmission range. The HH-185 can also be used with the PR-216 Plug-in environmental microphone mic input as a handheld, "point-to-sound source" type device to add functionality to the AT-216 assistive listening system.Features: Unidirectional microphone reduces background room noise Allows user to "point" to the desired sound source May be used as a pass-around handheld microphone