●Battery: 3.6V 600mA lithium ion rechargeable batteries ●Charging Method: USB port charging through special cable (input up to 5V 2A) ●Rotation Speed: 3 stage switching of approximately 5000, 9000, and 14000 min ●Charge Time: Full charge in approximately 2 hours. 90 minutes of use with full charge ●Rated Use Time: 15 minutes (continuous use not possible) | Accessories: USB cable, pointed bits: 3 types of precise drill/5 types of mounted wheel/6 types of electroplated diamond/3 types of buff/2 types of nylon brush/2 types of wire brush/1 paper drum upper/8 replacement drums (120 granularity)/1 spare collet chuck