Series 6600i headsets are designed for use with David Clark Company C6600i Body Switch Adapters and are ideally suited for potentially explosive, hazardous or toxic environments. The Series H6600i products are certified "Intrinsically Safe" when used in combination with I.S. approved radios. They are ideal for a variety of IS applications and environments including oil rigs, gas platforms, oil fracking operations, paper products manufacturing and other industrial environments that require IS-rated electronics. Series 6600i headsets are available in a variety of styles to suit specific applications. Quality components and manufacturing ensure clear, reliable and safe communication.