The full range of 16v and 20v brushless systems gives you variable speed control and a safe braking system with a versatile battery and allows for a large number of charge cycles Battery voltage:20v Output shaft:3/4"Quadrilateral axis No-load speed:1800r/min Impact frequency:2400bpm Maximum torque:2000N.m Net weight:3.7Kg Bolt specification:M16-M36 Delivery time:30 days for OEM,15 days for ready goods Payment method:T/T,L/C Standard accessory:BMC BOX*1,battery*2,charger*1