12" Trimmer & Edger 2-in-1 Flip To Edge Feature Easily Converts From Trimmer To Edger Patented Powerdrive Transmission Prevents Bogging Down In Heavy Grass & Weeds Afs(automatic Feed Spool) Ensures Continuous Work Without Bumping & Having To Stop To Adjust The Spool Quiet & Easy To Start 2mah Li-ion Battery For 33% More Run Time