This durable personal communication book is ideal for manual communication systems. The easy-to-open book stays open until you turn the page. Tabs on every page assist you in finding the right page quickly. Use one symbol per each of the 13 pages or use up to 9 symbols per page. Personalize with any type of photos, symbols, or remnants familiar to you. This book holds cards up to 3 inches by 3-1/2 inches. Use with picture symbols or real photos as shown.