Voltage:7.2V/9.6V/12V/14.4V/16.8V/18V Chuch Diameter:10mm Torque Stage:6/16 No load speed:0-550rpm/550rpm Charging time:3-5hours/1hour Packing Size&Pieces:50?45?29cm/5pcs Weight/Carton:20/19kgs Quantity:20container:2270pcs; 　　　　 40container:4390pcs