Introducing the original HandyTalker Scuba diving communication card. This low-tech AAC (Augmentative and Alternative Communication) card is perfect for underwater communication and does NOT require any batteries. You simply point to what you want or need! Are you a dive instructor who leads discover scuba dives? This is the perfect tool to have on your BCD to allow prospective divers to feel more comfortable underwater for their first dive. - Made of fiber-reinforced plastic - 3 inches wide x 5.5 inches tall - Includes a black safety lanyard - Waterproof Fully waterproof, simply rinse with fresh water after diving with all your other equipment! This communication card is a LOW-TECH solution that does not require batteries and does not produce sound. It is designed for simple communication—just point to express your needs. This specific device is an excellent tool to facilitate communication while scuba diving. HandyTalker is trademarked by Coatney Creations, LLC.