Toptekits 10A/125V USA Outlet Saver Power Extension Cord Cable 2-prong 2 Outlets for NEMA 1-15P to NEMA 1-15R It can be used as an extension for Christmas lights. Very useful when you need to connect multiple power adaptors into a small UPS or power strip and because of their shape they collide or block the access to other outlets.Length:16.4ft/5m Extend your power cord AND keep your UPS and surge outlets free Extend powered devices away from wall outlets,Durable, heavy-duty construction The female connector plugs directly into the device power cable while the male connector plugs into a standard outlet. NOTE:Female end is polarized but male end is not! this non-polarized power extension cord are safe enough since they are working under 110V AC (Alternating Current) power, and polarity reversing on these non-polarized old style power extension cord are still working fine without any issue, because it is an advantage of these non-polarized old style po