Cordless lawn trimmer series ryobi rlt cutting system line line cutting width 250 mm line feed semi automatic thread thickness 16 mm battery voltage 18 v type of battery li ion number of batteries with 1 battery battery capacity 13 ah running time 30 minutes charging time 3 h rotations per minute 9 500 rpm power transmission direct handle shape single tilting cutter head max spl 847 db max sound power level 93 db weight 21 kg