Rechargable Lithium Ion Dremel™ Drill. This 4V drill operates at 4 speeds from 8,000 to 25,000 rpm with a 3 hour battery charge.
 
The battery indicator LED light illuminates to notify you when the battery needs to be charged, which will illuminate with a red light when the battery is low. A green light will illuminate while charging. The light will turn off once fully charged.