This brushless lithium - ion grass trimmer is a high - performance gardening tool. It offers saw blade diameters of 6 inches or 9 inches. With an unloaded speed of 19000/min, it cuts grass efficiently. It runs unloaded for about 2 - 3 hours and takes around 2 hours to charge. Weighing approximately 1.8kg and made of aluminum tube and plastic, it's lightweight yet durable for garden weeding and trimming.