The psm 18 li cordless multi sander is a compact powerful all rounder for sanding and polishing even in hard to reach areas and on small surfaces the bosch microfilter system keeps the surrounding area clean when working with the psm 18 li the built in dust extraction element draws dust directly into the microfilter box provided a powerful lithium ion battery and charger are also available as separate accessories for the sander both components can be used in all tools in the bosch 18 v sys