high technology, powerful and steady motor, special windhole design,high quanlity Bearing, longtime working,professional quanl Volt&Freq. 110~230V,50/60HzInput Power 800W No-load speed 0-850r/minMax Drilling Dia 26MMBMC Packing Size/Qty:52.5x38.5x35.3cm/5pcs N.W/G.W: 18/20kg 26mm 800r/min electric hammer