We tested this at an endurance off road cycling event where it was part of the adaptive riders staging area. It's very durable and heavy, and we had no concern at all that it wouldn't take the use.
The tuner is strong and the sound is great. Dual speakers made sure everyone could hear, no matter where they were. In fact, we picked up stations we had never heard before. The built in USB charger worked perfectly, with enough power to keep the radio going and charge a few phones.