• 4 Operations & Game Modes: Firmly master the 3 levels of difficulty from repetitive practice to developing issues. Problem designed according to the first grades to learn instructions, improving calculation accuracy and speed simultaneously. It also has a fun game mode that allows you to build math skills naturally while playing • Automatic Scoring x Review Mode: Completely removes the hassle of parents score again! True/False readings instantly and won't delay learning feedback. Rechallenge the wrong problems instantly! Repeated exercises help you overcome mistakes and fix memories. Eliminate weaknesses in one session without leaving unknown problems! Everyday learning is bound to achieve • (Voice & Light to Motivate You) It displays clear voice and color light (Blue = Correct, Red = Incorrect & Incorrect response) at the same time, so your child can understand the results instantly. Report correct or False numbers after the answer is completed to visualize the "degree of accomplishment" to help you turn learning • Type-C Rechargeable: With a Type-C connection, this large capacity battery can last approximately 1 month with 8 minutes of use on a single charge. Can be used repeatedly, so you can save money on cram school or practice materials. Math training solves all with this one - an easy learning environment • Silent Mode x Ultra Lightweight: Equipped with a silent mode that provides you with the peace of mind. The size is palm size (about 70g) and is easy to carry when traveling or on the go. You can train your daily learning habits by "anytime, anywhere" without affecting the environment