The 3650A T-Hotbox is an 110-120 volt (1,000 watts) electronic dent reduction device that’s designed to be used by experienced panel repair automotive professionals on flat or convex shaped steel exterior body panel areas of passenger vehicles (open areas / no braces). The unit will reduce the size and appearance of small soft dents in a paint-less process when used as directed (device must be set to 0.5s or the maximum 1.0s setting and may require the use of the included plastic punch / knock down tool for blending). The T-Hotbox may also be used for the repair of small "medium sharp dents" in a “push to paint” mode (set to 100% power). This is the most common use for body shops and collision repair centers where refinishing is expected. * Please do your research on this product. There is a 20% restocking fee and returns are only valid within 10 business days after purchase. All returns are subject to certain limitations and must be approved by Anson PDR.