This rechargeable, lithium-ion battery motor utilizes a ‘wand’ device for motorized control of roller shades up to 84″ x 84″. The wand sits where a chain normally would, yet it is a safer option. The Automate™ Li-ion Switch Wand motor can also be adapted for roman shades. Uses Crown and Drive # MTCRDR-25-1.25 or #MTCRDR-25-1.5 (sold separately)