Which can be used to install the firmware on your device in a moment. One version for the RG351P/RG351M, and a separate one for the RG351V (which needs its own version due to hardware differences). There will be two versions of the firmware. The latest 351ELEC firmware can be downloaded from here: Note for Mac users: While this guide is intended for Windows PC's, you can achieve similar results using ApplePi Baker Software for working with compressed files (.zip.Win32 Disk Imager - Which you can find here:.The latest 351ELEC Firmware - Which you can find here:.A desktop computer or laptop with a way of accessing the contents of an SD card (a USB card reader, or a built-in microSD card slot).This can be anywhere from 16GB to 128GB in size (you can attempt to use cards larger than 128GB, although we can't be sure they'll work) To install the custom firmware, you will need: There are multiple custom firmwares out their for the RG351 family of devices, but the one we'll be going over how to install today is 351ELEC - the first custom firmware developed for the RG351P/M/V, and the one that we believe to provide the most straightforward, no-frills improvement over the stock version of the firmware. Expanded feature-sets for the device (depending on the specific firmware).The benefits of custom firmware are numerous, including: The following article is a simple guide intended to help you install custom firmware on your RG351P, RG351V, or RG351M. Check out our new comprehensive custom firmware guide for the RG351P, RG351V, and more!]