The O'Pro Double Level Slate is a bright white dive slate and comes with a lead pencil. This is a diving accessory that many divers prefer to carry with them. There are a few reasons of why we would carry a dive slate with us, first is dues to the fact that we can not talk underwater, the slate allows us to communicate to each other via writing. Another use is for those who want to take notes, species they saw, when and when! A simple note can often be more useful than a camera with no words. The Oceanic Double Level Slate comes 2 slates connected together with a hook system to allow you to connect it to your BCD via a D-ring, others prefer to pop it in to their pocket. Each to their own I say! This is a great present for a friend or family member who is a diver.