DGZZI Emergency External Backup Battery Box Safe Box External Power Box DC Male 3.5mm 4 AA Battery Holder with Cable Grey Safe Box Accessory for Key Safes

["The battery box is made of high quality flame retardant material, high temperature resistance, good conductivity, durable, not easy to deform, long service life.","With 3.5mm DC male plug, no welding, easy to connect, output voltage: 6V.","In case of battery failure, the safe can be accessed by inserting an external battery pack into the module on the safe.","The battery pack will power the module allowing you to access the safe using your registered fingerprint or password to replace the battery.","For certain safes, gun safes, key safes with external battery power."]