One of the reasons I purchased this lock was so I could safely keep it in my purse where I could stealthily unlock trigger. But there is an audible beep that sounds, which could give away my position and intentions. There were no instructions sent with the lock to set up fingerprint scan. I checked Youtube and found a quick video, but it did not have full instructions. I thought I had it done until I picked up the lock with my other hand and my palm touched the scan reader and unlocked the lock. Every finger unlocked the lock. My nose unlocked the lock. I took it to work (sans handgun) and 3 other people were able to unlock it. Tossed it in the dumpster.