About this item -There are two power supply methods. You can use a USB cable to connect the adapter, computer, and power bank, or you can install 4 AA batteries (not included). -The chip collection box adopts a transparent design, making it easy to observe the remaining capacity and clean it in time. -Using dual-hole design, one is suitable for 6-8mm and the other is suitable for 9-12mm. -Equipped with a safety slider to prevent children from accidentally putting their hands in. -The bottom has an anti-slip design to maintain stability during operation and reduce vibration. -Suitable for sketching, writing, and painting. It can be used with different pencil types to meet different needs. .