Easy to use, large capacity and smart (sliding dial protection cover). Although I used some other different key storage keys at the work site, I wanted to have a lot of difficulties in handling and difficult to operate, but this is easy to dial, the lid does not fall, it is robust. It is very satisfying, such as simple password change which is hard to misoperate, resin cover hard to scratch the door, shackle attachment / detachment lever which is difficult to operate erroneously. Moreover, it seems that it can be used as a permanent storage by screwing the back side of the box and it can be used as a permanent safekeeping and unlocking button to unlock button such as automatic shutter etc. (If it is a little bigger, it will be better if there is a cap removed from the shackle)
Because it is large, I purchased it because it can be put in with the card and key. I think that it is easy to use and good product. Easy to operate also makes it easy to get the key even if it is mounted in a narrow place.