【Overview of this Book】 This book is a practical guide explaining how to use smartphones for seniors aged 70 and over. In particular, it is packed with specific techniques and tips for mastering smartphones. - Title: Smartphone Mastery for Those Aged 70 and Over - ISBN: 978-4-7762-1352-9 - Publisher: Ascom - Price: 1,580 yen - Target Age: 70s, 80s - Number of Pages: Approximately 200 pages Thank you for viewing.