The DeNova Detect Natural Gas Alarm with Voice Alert DD620NV is a reliable gas detector designed to detect natural gas leaks. With a 10-year battery expiration date from the start of use, this alarm provides peace of mind for a long period of time. Manufactured in Mexico by DENOVA DETECT, this unit is a must-have for businesses and industrial facilities looking to ensure safety against potential gas leaks. The voice alert feature adds an extra layer of convenience and awareness for users in the event of a gas leak.