DEWALT DCST990M1R 40V MAX 4.0 Ah Cordless Lithium-Ion XR Brushless 15 in. String Trimmer (Certified Refurbished) This Certified Refurbished product has been tested and certified to work and look like new, with minimal to no signs of wear, by a specialized third-party seller approved by Amazon. The product is backed by a minimum 90-day warranty, and may arrive in a generic brown or white box. Accessories may be generic and not directly from the manufacturer. Brushless motor for a longer life Dual 0.080 in. line with bump feed cuts through thick matter Variable trigger with speed control provides precise speed control Metal gear case for on the job durability