This is the Trident Diving Slate with Retractor and Compass Features: Snap clip to attach to a BCD or other gear Slate and pencil to take notes or record dive times Compass for navigating underwater Retractor easily pulls it out without unclipping DIVE COMPASS - Explore and find new trails, caves or tunnels with a diving compass. DIVERS SLATE - Our underwater slate is perfect for notes, sketch maps, and water conditions. RECORD - Log info and chat with scuba buddy with underwater pencil on underwater slate. EASY WEAR - Attach our retractor compass clip on to a BCD so that the scuba retractor stays put. CLARITY - Our compass dive tool has easy-to-read numbers with a red needle to easily navigate. Item Package Dimensions L x W x H 9 x 8.87 x 4.75 inches Package Weight 0.16 Kilograms Brand Name Trident Manufacturer Trident Part Number D684 Diving Slate with Retractor and Compass offers a two-in-one tool for note-taking and navigation while diving, boating or fishing. You can take notes, sketch maps, record water conditions and find new trails, caves or tunnels. It comes with a slate, an underwater pencil with a stretch line, a retractor with a snap clip and a compass. Attach the snap clip to your BCD for hands-free use. The compass has large and easy-to-read numbers with a red needle.