The Raychem NGC-CMA is an easy-to-use wireless handheld device for configuration and monitoring of Raychem NGC-20 control units. The handheld device has an intuitive user interface eliminating the need for extensive training. The hand held device is available in two versions.For non-hazardous areas, use type handheld device:NGC-CMA-NH. For hazardous area Zone1 (Zone 21) and Zone2 (Zone 22), use type: NGC-CMA-EX.