The X217 is a dual 2×700 battery mod, which means you can use 21700, 20700 or 18650 batteries with it. It's rated at 217 watts with an upgraded screen and of course GENE chip. I'm not sure of the color options available as I couldn't find any reliable information on that, but I have seen pictures of a few color options. Mine is listed on the box as "purple jade" and it's a gunmetal body with black/red/blue resin accents. When I first saw this mod, I was pretty impressed by the design and feel of it. The finish looks great and it has carbon fiber accents, some nice resin panels on the back and the fire button, a bright large color screen, and a centered platform for the 510 to handle 30 mm atomizers. It reminded me a lot of the SX mini G class mod, but a little bigger and made to accommodate larger batteries.