Aftermarket Stack-On Electronic Digital Safe Lock Replacement Solenoid With 2 Key Specification:Code Length: 6 digits Static current: 10 u A Power Supply: One 9V Alkaline battery (not included) Battery life span: About one year Battery low voltage: 4.6 +-0.3V Working humidity: (max) 90% Bolt type: Swing Bolt Zinc Alloy Internal moving part lock kit Actuation time: 5 s