1Main Purpose: The wrist writing dive slate can help the communication between the diver and the diving partner, and the underwater situation. 2Floating Pen: The pen will be suspended in the water and will not fall. When used underwater, the pen is more convenient for the diver to write. 3Hang Position: Diving wrist writing slate can be hung on a diving buoyancy vest. The attached pencil is fixed to the writing board by a hose. 4Elastic Arm Straps: Arm straps are unisex, elastic adjustable, can be worn by both fat and thin people. Product model is UW193TD luminous. 5Good Features: Underwater wrist writing dive slate can be used repeatedly, can communicate during diving, anti corrosion performance. 6Underwater Communication Tools: The diving writing board is a tool for underwater communication or swimming pool communication. Item Type: Wrist Writing Dive Slate Material: ABS + Composite Wood Product Model: UW-193TD Luminous Color: As Pictures Shown Weight: Approx. 150g/5.3oz Features: Can Be Used Repeatedly, Can Communicate During Diving, Anti Corrosion Purpose: The writing board can help the communication between the diver and the diving partner, and the underwater situation; the pen belt will be suspended in the water and will not fall. When used underwater, it is more convenient for the diver to write 1 xWrist Writing Dive Slate 1 xPencil 4 xO Rings 1 x Rubber Accessories