Easy to Install---Solar panel charger is a choice for interior solar screen and blackout shades have built-in lithium ion batteries, solar powered window blind motors Application and Specification---Working with rollerhouse motorized blinds with rechhargeable batteries, Voltage 9V, Working power 1.7W, Power cord：24 inch, Dimension: 18.5*1.38*0.35 inch Compatibility Connector---3.5x1.35 mm Male DC jack connector works with ERB blind motor perfectly. Make sure you get the adapter to fit between the solar panel plug and the roller motor socket. Bracket Installation--Be sure the blinds are on the south side of your house with lots of sun most days Operation---Shorten the original solar cord so you don't have as much to hide, Idea is to swap between multiple blinds in order to charge Item Weight 8.8 ounces Manufacturer Rollerhouse Item model number Rollerhouse Solar Panel Charger Is Discontinued By Manufacturer No