Backpack utilizes integrated battery to provide long run time when used with 18VX2 LXT, 40V MAX XGT or Direct Connect power tools. Self-standing design allows backpack to sit upright for added durability. Retractable carry handle for operator convenience. Main power switch with 8 hour auto-off function conserves battery power when not in use. Belt pouch securely holds power cord adapter when not in use. Reflective design increases operator visibility in the dark. Can be used with the Line Trimmer Hanging Band (191E43-4 or 197243-4).