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 things close up, hold them in your hand, and study their texture. When you are shopping 808L Gas Detector, Voice Warning Kitchen Alarm Kit Independent of Combustible Natural Lcd Display Gas Sensor online, pictures are the closest thing to that there is. I would not suggest buying from any on the web goods shop that doesn't display pictures of the product. You should research the online goods shop's shipping policy. How much is going to 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 anticipate 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 "FAQ" page on the site. Previous, but certainly not least, you must find out what forms of payment the web page accepts. This seems like it might be obvious, but I won't be able to even count the times that I've found a wonderful quality merchandise on a site, only to find out that they don't accept one of the forms of payment I have offered.