Aspire NX30 Box MOD is powered by a built-in 2000mAh LiPo battery. With its tiny size, the NX30 provides max 30W output. Nautilus X fits Aspire NX30 perfectly. And the two products forms up Aspire X30 Rover Kit. You can carry the X30 Kit everywhere with the lanyard strap. 4 colors are available.