Voltage:7.2V/9.6V/12V/14.4V/18V Chuch Diameter:10mm Torque Stage:6/16 No load speed:0-550rpm/550rpm Charging time:5-7hours Packing Size&Pieces:50?45?29cm/5pcs Weight/Carton:32/31KGS Quantity:20??container:2270pcs;40?container:4390pcs