Features 1 Maximum speed of milling head: 30000rpm; stepless speed regulation; smooth running 2. Sheath is designed on milling head to ensure the safety of operation. 3. Battery voltage: 14.4V; exempt from disinfection design; 2 batteries; 4 Safety and fast mill head removing device; 5. Strong host power, conjoined closed cover; 6. Suitable for high temperature sterilization; 7. Along with 4 pieces of milling head;