Heil Sound Black ProLine PR781 Original Performance Dynamic Desk Studio Microphone Bundle with Triton Audio Fethead In Line Microphone Preamp and XLR Cable PTZ Optics Mid (III) and High Band HL14001 Mid (III) and High Band (II) rotary knobs to cut and boost frequencies of your signal The Eartec UL5S is a full duplex wireless intercom suitable for facilitating communication among five people the PR 781 offers beautiful wide frequency response while keeping that traditional Heil Sound articulation of the speech pattern something ALL microphones seem to lack and that has been the mainstay of the Heil Sound line up From the amateur radio division of Heil Sound