BLACK+DECKER LSTE525BT 20V Smartech Max Easy Feed String Trimmer SMARTECH iOS and Android compatible app enables Bluetooth controls allowing remote battery locking/unlocking, battery locate, state of charge and programmable alerts and reminders Battery contains a built in USB port for charging phones, tablets, mp3 players - (2) LBXR20BT SMARTECH batteries included EASYFEED advances your line with the push of a button - no bumping required POWERCOMMAND Family of tools; EASYFEED, POWERCUT, POWERBOOST - helps solve common user frustrations when using Outdoor Power Equipment Part of the 20V MAX System - 1 System. Endless Tasks. Power for your Style