This engaging electronic flash card is an engaging way to build number fact fluency in just a minute. Youngsters can practice operations (add/subtract or multiply/divide) and early algebraic skills (equations and commutative property). Gives visual and auditory positive, corrective feedback. With three levels of difficulty the Flash Card offers 60-second timed mode and un-timed mode (low-pressure). Color-coded screen frames reinforce parts of the equation. Durable unit with volume control measures 5 1/2in.H. Requires 3 AAA batteries, not included.