You can even turn the humble handheld device into a working walkie talkie. The build relies on ... but the video shows it operating in the UHF band around 433 MHz. With a power on the order ...

For example, when you’re driving an ATV, paddling a kayak, or needing to check in with someone out of cell service quickly, that’s the niche walkie talkies fill. You just hit a button and talk into ...