Protect your pistol and valuables with a safe storage solution. The combination on the Hollon PB10 is easily changed and a backup key is included if you forget your combination (make sure to keep this in a safe place). The lock takes 4 AA batteries and it retains your combination even when the batteries are changed. A unique feature of this pistol safe is that if the combination is entered incorrectly 3 times, it will lock the person out.