Used. Is not complete, see photos for what you will receive. I do not know how it works because I am not an expert on this item, if you want me to test it I am happy to if you can explain to me how it works. I think you need a key to open it and I don't have the key. Ships from a smoke-free and pet-free warehouse. 100% Money back guarantee. You will receive exactly what is pictured/photographed, if something is not shown in the photo, it is not included. Ruler is NOT included in purchase, it is shown to help show the size of the item. Tip: mouse over or click on the photo to view a pop-up of an enlarged version of the photo to see all the details! We guarantee your satisfaction with your purchase or your money back! You can purchase from us with confidence, we have sold over 8,000 items to happy buyers just like you. Most buyers receive their order within 2-4 business days of payment. And we pack every item with care to ensure you receive it in the same condition as is described and photographed in the listing! Questions are welcome, we will reply quickly.