This is the Hollis Wrist Slate with 3 Writing Surfaces for Underwater Communication Features: 3 Writing Surfaces for plenty of room Adjustable Velcro wrist band Curved to fit comfortably around wrist and reduce drag Bright bungee lanyard attachment Comes with spare pencil and extra o-rings for keeping slates closed Never miss a word with Hollis&'; streamlined, convenient Wrist-top writing slate.