1)   Voltage: 20V
2)   Two no-load speed:0-8500RPM
3)   Disc size:100/115mm
4)   Spindle thread:M10/M14
5)   Automatic spindle lock function
6)   Precise bearing for long durability and low consumption 
7)   Variable speed with quick stop
8) 2PCS of LI-ION 4000mAh battery pack
9) Charging time:3-5 hours with slow charger/ 1 hour with fast charger
10) Ergonomic design for less fatigue and more comfort