T Also a part 90 grant does not automatically make it a public safety grade radio.
+10 to this. Even before the cheap Chicomm WOC radios arrived, years ago the lowest end of low rent radios to get part 90 certified were JobCom RT-15Cs.
These things were so low rent they didn't even use a condenser microphone but the SPEAKER element as a mike. They had a blister pack battery, soldered in place that was like what you would find in a cordless phone handset.
They would BARELY stay on frequency, had horrible front ends, and never got close to the rated power. Somehow Ritron was able to get them certified and just like the Chicomm radios of today, they sold millions.
But I would NEVER put one in the hands of ANYONE who's lives depend on them to work, EVER. I wouldn't even feel right handing one to the school janitors. Reminds me of when I was in the 8th grade and watched a RT-15C become crushed in a trash compactor at my middle school. That is the BEST THING that could ever happen to one of those.
To the O/P: please spent a little money and buy a better radio. Even new, radios like the Kenwood TK-2313/3312, or Icom IC-F2000 are miles above any of the offshore stuff, well supported, have 2 year warranties, and advanced signaling like MDC1200. The Icom is also IP67 water proof rated and even has an advanced emergency alarm which can be activated if you are not in motion, like a tilt switch. Both of these radios are full featured, fully part 90 compliant and are built much better and have superior specs to any low cost WOC Chinese radio.
Please buy the right tool for your job.