The Marshall CV6XX-HFH is compatible with the CV612/CV620/CV630 PTZ Cameras. Made from impact-resistant Polycarbonate Thermal Plastic, this weatherproof dome is the ultimate barrier to protect the camera and other sensitive components from harsh environments. The Heater & Blower components work in all weather conditions ranging from freezing to hot climates. The CV6XX-HFH is an engineered outdoor housing system designed to expand all indoor camera models into complete rugged outdoor system solutions.