Gas free cordless design eliminates the gas hassle while getting the job doneLighter, reliable, easy push button start will not wear your arms out. No-load speed (RPM): 0 - 9,000Pivoting head allows for edging and trimming capability with edging wheelCompatible GreenWorks Replacement Spool, Model 29252 and 29092Battery and Charger include. Compatible with battery models 29462 and 29472 and charger 29482