Features:This compact electric eraser can erase small areas on artwork quickly and precisely.Strong decontamination, not easy to destroy paper.Moderate size suits hands perfectly, portable and comfortable to hold.Adopting internal electric motor which is low noisy and safe.Labor-saving and effective, perfect stationery for art students, teachers and those drawing lovers.Specification:Weight: 121g/4.3ozBattery capacity: 600MAHCharge Mode: USB chargingMotor voltage: 3.7VColor: WhitePackage List:1 x Electric Eraser 1 x USB Cable 2 x Plastic Clamp of Replacement Refills16 x Replacement RefillsNote:1. The charging interface is for android port. Plug in the power adapter charger with USB or USB port.2. When charging is normal, the signallightis normally blue. When the signallightis not on, it means charging is full..