This version the VE10 has 2 methods of entry in the 4-8 digit electronic entry and backup override keys.What makes this safe really awesome is its portability. It uses a lithium-ion battery that charges in 2.5 hours and lasts 4-6 months making this ideal for the car a backpack or your suitcase. It’s made with only 18 gauge steel so it keeps the product light enough to actually be portable.