32pcs Cordless Precision Rotary Tool features rechargeable 3.7V lithium-ion battery with convenient micro USB charger.
Content:  
1pc Rotary Tool
1pc USB Charging Line  
12pcs sanding Drum
1pc Mandrel
5pcs Abrasive Stone 
1pc Brush 
2pcs Hss Drill 
6pcs Diamond Burr Bit 
1pc Rotary Burr
2pcs Polishing  
Specification:
Battery Voltage: 3.7v
Battery Capacity: 700 mAh
USB:Type-C
Speed:  6K/12K/18K RPM
Head diameter: 3MM