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:1/2"Quadrilateral axis No-load speed:2500r/min Impact frequency:3300bpm Maximum torque:500N.m Net weight:1.14Kg Bolt specification:M10-M24 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