Next stepPrevious stepnaim NDX 2Oops! You’ll need to turn on Javascript (also known as Active Scripting) to see all the pictures.1. An external power supply (XPS DR or 555PS DR) can be used as an upgrade for the NDX 2.Previous topicAll topicsNext topicChange deviceEmail thisShareShare With…TwitterFacebookWhatsAppPinterestTumblrFeedback