Feature:1. Thick And Thin Eraser Tip: Two kinds of diameter tip can be exchanged, 5mm and 2.3mm are optional.2. Eraser Length Adjustable: Pull out the eraser head, adjust the length you want, insert it and use it.3. 2 x AA Batteries: Open the back cover, put in 2 AA batteries, and you can use it (battery not included).4. With Eraser Refills:10 small refills and 10 large refills are included. In addition, an additional box of 50 5x25mm refills.5. Features: Sketch highlight electric eraser, adjustable thickness, easy to draw highlight effects.Specification:Item Type: Electric ErasersProduct Material: Plastic, AlloyBattery Type: AA Battery (Battery Not Included)Number Of Batteries: 2.Package List:1 x Electric Eraser2 x Plastic Eraser Jacket10 x 2.3mm Eraser10 x 5mm Eraser70 x Rubber Refill