This is a well-known underwater notebook for communication during diving! It has absolutely no issues with use, and I've customized it with a carabiner, coil, and buckle belt, making it very easy to use! The bell stick that's lowered with the retractor is also easy to use; you can shake it to make a bell sound when you want to draw attention, or use it for various other purposes, like indicating something dangerous to touch! Shipping will be via the secure and safe Rakuraku Mercari delivery service! Please understand that the packaging will be simple, with the item placed in a bag and wrapped in bubble wrap.^^;