ECHO CST-58VBT 58-Volt Lithium-Ion Brushless Cordless String Trimmer - Battery and Charger Not Included Brushless motor for superior power, run time and durability Variable speed trigger for ultimate power control High/low speed switch for more power or extended run time Speed-feed dual line bump feed head for easy reload 14 in. - 16 in. adjustable cutting diameter for extended run time or more aggressive cutting