Barska External Battery Pack For Barska Safes 7 in Cord Tan 2.5 x 2.75 x 0.7 in. In the event of battery failure this External Battery Pack can be used to access the safe by plugging it into the Biometric Fingerprint Module on the safe. The Battery Pack will then supply power to the Barska Biometric Module allowing you to access the safe with your registered fingerprints to change the batteries. Specifications for Barska External Battery Pack For Barska Safes: Manufacturer: Barska Color: Tan Fabric/Material: Plastic Features of Barska External Battery Pack For Barska Safes: Compatible with Barska Safe Models: AX11224 Standard Biometric Safe AX11620 Compact Biometric Safe AX11650 Large Biometric Safe AX11652 Four Rifle Biometric Safe AX11898 Large BiometricRifle Safe AX11780 Extra Large Biometric Rifle Safe AX11556 Top Opening Biometric Safe AX12038 Wall Mounted Biometric Safe AX12408 Large Biometric Wall Safe Holds 4 AA Batteries Not Included Package Contents: Barska External Battery Pack For Barska Safes Barska AF12654: External Battery Pack For Barska Safes 7 in Cord Tan 2.5 x 2.75 x 0.7 in