The wizMart NB740-S-1M is a reliable, standalone DC smoke alarm designed to provide long-term safety with minimal maintenance. Engineered for a decade of service, this unit features a sealed, non-replaceable 3V lithium battery, ensuring continuous power and protection for 10 years from the date of manufacture. Its hassle-free, battery-operated design allows for easy installation in any room without the need for wiring. Fully certified and compliant with the rigorous EN 14604:2005/AC:2008 European standard, this smoke detector offers dependable early warning in the event of a fire, making it an essential safety device for any home or residential property.