DSPIAE Portable Electric Sanding Pen

3 rotation speeds: 5000/10000/18000, Battery Capacity: 300mA Compatible with most maintream drill heads. This product only support a grinding head with a shank diameter of 3.0mm. Also compatible with rods within 3mm in size for creative work. Quickly recharge: Simply connect it to any USB port , ensuring uninterrupted usage whenever inspiration strikes. Precautions: 1-Do not allow children under 14 years old to use this product alone to avoid injury. 2-Avoid dropping, bending,or beating the grinding head,otherwise, it may be damaged and cannot be used. 3-A large amount of dust may be generated during use,please take protective measures. 4-Do not place the eletric grinder in a high-temperature environment above 40?. 5-Do not cover objects when charging to ensure good heat dissipation. 6-When not used for a long time,it needs to be charged once every six months to prevent over-discharge of the lithium battery.