You need to find out rather or perhaps not the vendor has pictures available of the product they can be selling. When you're shopping in person, you have the option to look at items close up, hold them in your hand, and study their texture. If you are shopping 50Pcs WS2811 RGB LED Pixels Light Individually Addressable 12mm Diffused Digital Full Color LED Pixel Module Light DC12V online, pics are the closest thing to that particular there is. I would not suggest buying from any on line goods shop that doesn't present pictures of the product. You need to research the online goods shop's shipping policy. How much can shipping be? Is it free of charge? If it's free, will it take an eternity to arrive? If I need to pay for it, when can I expect my purchase to arrive? These are all traits you as a consumer should know, and you can usually easily find the answers to these questions simply by find a "Shipping Policy" or perhaps "FAQ" page on the site. Last, but certainly not least, you have to find out what forms of payment the web page accepts. This seems like it might be obvious, but I aren't even count the times that I've found a wonderful quality product on a site, only to find away that they don't accept many of the forms of payment I have offered.