The HPC Replacement 24 VAC/100VA Transformer reduces the line voltage to allow your fire pit to operate on your electronic ignition system’s required voltage power. PRODUCT FEATURES: 24 VAC Transformer (100 VA) For Use with HPC Electronic Ignition System (EI) Series Made in the USA HPC has partnered with BILT to provide you with an easy-to-use app that walks you through the installation process, and assists in troubleshooting of your new fire pit. You can download this app by searching for “BILT” in your app store (available for Android and iOS ).