DS pen is robust in performance and durability. It has battery that is replaceable and disposable. With AAA battery, pen's minimum life is 140 hours (active/continuous use). DS Pen goes into sleep mode when not in use to save battery life. Compatible with current and previous versions of the Intelliboard, DPA II, IPM and DPA interactive whiteboards and software releases. Includes kit that has two (2) AAA batteries and two (2) replacement pen tips. DS Pen Holder is an accessory that mounts to side of the board to hold the DS pen. It is mounted with 2 screws that secure it to back of board.