The Echo DPAS-2100SBC1 is a 56V eFORCE Pro Attachment Series battery powerhead kit designed to be attachment-capable, allowing one powerhead to run multiple ECHO PAS compatible tools. It comes configured with the Speed-Feed 400 trimmer head and includes a 2.5Ah battery with standard charger, making it suited for trimming and general yard maintenance with fewer gas-related hassles. (acmetools.com)