1st I need to say , your tv must have a hdmi port if you are buying this , I bought this then I bought new tv with hdmi port , its really turns your tv in smart tv , you can access youtube ( you must have 2 mbps speed of internet speed if you going to surf YouTube videos without buffering) , full hd resolution 1080p , you can use it to surf video from your media server must be connected your local network , wifi range is good , but I suggest your router nearby Chromecast, so it can receive full signal of router , configuration is easy install chrome app in your phone and follow the instructions on the tv and configure it , it gives you option to mirror your phone on tv , chromecast , so overall if you have a old tv with HDMI port it will make your tv more intresting and smart. My suggestion is buy it