XXL alarm safe with digital combination The XXL alarm safe no. LFW205TWC with digital combination from Master Lock has been developed to protect documents, digital media and other valuables against fire, water and theft. This safe is equipped with a touch keypad and a loud audible alarm signal, providing state-of-the-art protection against theft. The 60% larger bolts (compared to conventional safes) and the pry-resistant hinge strip provide additional security against unauthorized access.