Max drilling diameter:10mm Rated Voltage:110v,220v Rated Frequency:50Hz,60Hz Rated Input Power:700w No-load Speed:0-3000RPM Electric/Power Hammer Drill 1.The hight-power drill is trustworthy2.Double insulated structure 3.Grease encapsulation Max drilling diameter:10mm Rated Voltage:110v,220v Rated Frequency:50Hz,60Hz Rated Input Power:700w No-load Speed:0-3000RPM.