18v lxt lithium-ion brushless cordless string trimmer kit, 4.0ah,up to 30 minutes of run time with 4.0ah battery under load on the high setting, bl brushless motor delivers up to 6,000 rpm for faster cutting, automatic torque drive technology automatically shifts from 4,000-6,000 rpm depending on density of application, 3 speed options, (low: 4,000 rpm, medium: 5,000 rpm, high: 6,000 rpm, 11-3/4″ cutting swath for user convenience, accepts industry standard m8x1.25 lh spindles, includes: 18v lxt brushless string trimmer #xru11z, 18v lxt lithium-ion 4.0ah battery #bl1840b, 18v lxt lithium-ion rapid optimum charger #dc18rc, shoulder strap & safety goggles.