With this mobile powerhouse, you have everything under control. You get the same power as the corded Dremel 4250, but you are independent of power outlets. Powerful and reliable: The new Dremel 8240 impresses with its power and sustained performance. It offers the same strength as the strongest corded Dremel 4250 and delivers precise, efficient results – whether for DIY projects or professional applications. Battery compatibility: Dremel 12V battery system - compatible with the Bosch Professional 12V battery platform. Maximum comfort: Includes Dremel system box – a stackable carrying case with adjustable dividers for organized storage of tools and accessories. Special feature: without battery, without charger.