The Casio Pro-Trek PRW-3500 vs. PRW-3000: A Quick Comparison - YouTube
CASIO PRO TREK TRIPLE SENSOR SOLAR PRW3500-1 - Claudias Jewelry Inc
PRO TREK PRW-3500 - YouTube
Casio Pro Trek prw-3500. I climb and trim trees for a living, so I needed a tough, dependable solar watch that could tell me the temperature and altitude. Worth every penny, and
Casio Pro Trek PRW-3500-1ER Review and Unboxing - YouTube