Indipro B-Stock products may show various signs of use, such as dents or scratches that do not affect product function. All B-Stock items have been quality tested and comes with a 30 day limited warranty. This 20″ 2.1mm to Sony NP-FW50 type dummy battery allows you to power a Sony a7 Series camera from any power source with a 2.1mm barrel connector input and 7.2 – 8V output. It is an unregulated cable and cannot be used with devices outside the 7.2 – 8V range. The dummy battery end is compatible with the Sony a7, a7S, a7R, and a7 II, a7S II, and a7R II cameras. Made in USA.