1Adjustable Gear: Two adjustable gears for thick or thin nib, which can meet different use habits, suitable for writing, painting. Premium ABS material ensures high durability. 2Wide Compatibility: This electric pencil sharpener is suitable for 78mm rod diameter writing pencil, painting pencil (2B4B) color lead, round pole, trianglular pole, hexagonal pole, hole pen. 3Replaceable Holder: This electric pencil sharpener possesses replaceable knife holder with concealed design, one knife holder can be used about 3000 times. 4High Safety: This electric pencil sharpener will automatically power off when lid is opened. The hided knife holder design and the silicone material will not hurt your hands. 5Large Capacity: This electric pencil sharpener possesses 2000mAh battery, providing over 300 times sharping after fully charged. No need to disassemble, the broken lead will automatically come out with slight press.