Amazon.com: Casio Pro Trek Bio Mass Tough Solar Triple Sensor w/Thermometer Altimeter Barometer Compass World Time Men's Watch PRG340-1 : Clothing, Shoes & Jewelry
PRG-270-1A | PRO TREK PRG-270 Series | CASIO INDIA
Amazon.com: Casio Men's Pro Trek PRG-270-1 Tough Solar Triple Sensor Multifunction Digital Sport Watch : Clothing, Shoes & Jewelry
Casio PRG 270 - module 3415 - review and a detailed tutorial on how to setup and use all functions - YouTube