Model Sparrow20E is an air-cooled 20W fiber laser machine. It is the split unit of Sparrow20. Same functions, small and compact, weighs only 30kg, With the WINDOWS based marking software and manual. Beside you need an extra computer/laptop on the it, the machine are exactly like the Sparrow20. It can do fine marking, deep engraving on all metals, including precious metals like gold and silver and some non-metals. Switches are on both the machine and PC, very easy to use.