Retevis RT10 900MHz two way radios are a much better option for off-grid personal communications than FRS and GMRS radios for three reasons - build quality and simplicity, characteristics of the 900MHz band, and encryption capability. Watch my Youtube review of the RT-10 and my comparison with the Retevis RT81 and Motorola XPR7350. If you are interested in buying the RT10 please support this site by using this Amazon affiliate link where you can get two of the radios for $125 with the coupon.
The GQ GMC-320 is a Geiger-Muller counter that can accurately detect radiation levels and even contribute to the crowdsourced radiation map at GMCMap.com. If you like this, please follow my affiliate link to Amazon, where it is currently available at the discount price of $110.
The EF Johnson 5100 ES is my favorite radio for amateur / ham and first responder use. They were produced
EF Johnson (now Kenwood) for military and first responder dual use, and are available in VHF, UHF and 800MHz versions. We periodically put some "fully loaded" versions of these radios up on eBay for sale that have been enabled for keypad programming, allowing you to program frequencies from the front panel. Watch our overview and programming video for the VHF version of this radio (the process is the same for all versions). Check out our eBay site to see what we currently have for sale.