Encourage your kids to make reading a daily habit with the Mark-My-Time® Digital Bookmark! At the top is a digital clock that's powered by a replaceable watch battery. Choose to set a countdown timer with alarm that alerts readers when they have completed their required reading time or use the cumulative timer, which stores up to 100 hours of reading time over multiple sessions until the reader chooses to delete it. A 60-second countdown/count up feature displays seconds at the one-minute mark to aid in fluency checks. Ideal for monitoring reading time, timing music practice sessions, timed math fact activities, meetings, home study sessions, and so much more! Recommended for ages 5+; measures 1.75" x 7.75".