Powered by 500mAh built-in battery, the Velx Prism Battery is a unique vape device with 3 adjustable settings to adapt to different kinds of concentrates. Using a magnetic connector, the VELX Prism is compatible with most atomizers of 510 thread. It also features patent pending dual pre-heat functions (Tank Pre-heat & Coil Pre-heat) to ensure even distribution of heat both from the coil and tank and bring the purest flavor.