EDIT: A few months after my initial purchase, i have more information to add to my review.  There's good news and bad news.First, the bad news.  Out of the 6 radios total i've put into use, two of them became unresponsive after a very short period of time (one around 3 weeks, the other at 6 weeks); by "unresponsive" i mean that none of the buttons did anything when pressed, and incoming transmissions were ignored.The good news, part one: there turned out to be a fix for this!!  Hold down FM (the nose) and PTT (the talk button on the ear) to reset the radio.  It worked like a charm!  The good news, part two: the seller was really super cool through this, and went way, WAY above and beyond to make sure i was happy.  They actually restored a small piece of my crumbling faith in humanity -- they were THAT NICE.ORIGINAL REVIEW:Although my elderly mother lives with me, she remains very afraid of injuring herself in a fall and not being found for a while.  An emergency call button didn't seem like a good fit for our situation, so since i'm always nearby, we thought we'd try having her wear a walkie-talkie.  I selected these because they're small and can be worn either as a pendant or a watch; the fact that they're also cute was basically icing.  I was concerned Mom might have trouble with the sound quality, as she's a little deaf, but she can hear and understand me just fine through them.  After trying them out for a bit, we decided we like them well enough to order a second set so that two of them can be charging while the other two are in use.Speaking of charging, my personal experience implies that "5 days stand-by" may be an overgenerous estimate, or at the very least, somewhat misleading.  Mom and i exchange maybe 2 sentences per day via walkie-talkie, and still the batteries never seem to last more than two days (her unit needs charging more often than mine -- usually every day -- for reasons clarified in the next paragraph).  To be fair, we have NOT tested the stand-by time by leaving the radios turned off for 5 straight days to see if the batteries last that long, but then again, i can't think of any reason why being able to do that would be useful to anybody.  When i first got these, i was excited to see that there's an option to lock all buttons except PTT (push to talk), since i hoped it would reduce the odds Mom would set off something noisy when rolling over onto the pendant in her sleep.  However, it appears that *only* the menu button (right eyelid) is locked by this function.  Mom is constantly pressing the nose button by accident, which turns on the FM radio and startles her.  For obvious reasons, i didn't want this to happen while she's sleeping or cooking, but those are of course the circumstances under which she's most likely to inadvertently hit the button.  My initial solution was to find an FM frequency that's almost silent, but since she couldn't hear it, her walkie was often running -- draining the battery -- either until i noticed the crackling sound, or until she heard the "low battery" signal.  So i have now set her radio to an FM station loud enough for her to hear, but hopefully not loud enough to give her a heart attack when it comes on unexpectedly.  If this doesn't work out, i may have to shave off the nose button, which i only haven't already done because Mom thought it would make the kitteh look less cute.In any case, we do like the walkie-talkies well enough to have ordered two pair.  I set all four of the units to the same channel and they work together perfectly.  The wristbands are scored along almost their entire length, allowing them to fit wrists anywhere from "small child" to "obese woman" (that would be me).  Mom likes the way they look -- both the colors and the cuteness -- and loves the added feeling of security.