frequency input power chain saw velocity Chainsawspeed400m/min weight Weight6.0kgKEN company in the international reputation of the professional power tools, Shanghai Qi Rui tool limited company has now grown into China in the high-end professional electric tools as one of main manufacturer. Since since Ken to take root in Shanghai, the company spent heavily to introduce international advanced technology and equipment, with its superb manufacturing technology, excellent quality management and” robust, efficient, convenient, safe” KEN professional image, make Qi Rui professional electric tools in China Electric Qi Rui professional electric tools not only through the Great Wall of China electrical products safety certification it also passed American UL certification, the European GS certification, CE certification, and filed many patents, such as: industrial design patent, packaging design patents and so on, to the maintenance of Qi Rui brand and the interests of users to provide a strong guarantee.