AKG HSC15 High Performance Lightweight Design Conference Headset. The HSC15 from AKG is a professional conference headset for phone conferencing, VOIP, assistive listening, interpreters and school applications. An adjustable and lightweight design allow for hours of comfortable use. The bow is made of stainless spring-steel, designed to keep it´s shape, but also flexible enough to for different wearing positions. The microphone features an omnidirectional condenser capsule, designed for a wide pickup range.