I have kept this item at home since I purchased it, and I have never used it. As you can see in the 20th image, the red pin on the lock dial has not been removed. The lock dial is set to 000, as it was when new. Please refer to the instruction manual to set it. The capacity is 23L, so it's suitable for carry-on luggage. It's a compact and easy-to-use carry-on case. Although it is unused, please consider that it has been stored at home. Feel free to comment (^-^)