Stay one step ahead of Mother Nature with the Solar Powered PRG300, withTriple Sensor Version 3 engine. Advanced CASIO original technology has allowed for a 95% smaller direction sensor and 90% reduction in sensor power consumption. Despite their smaller size, the new sensors in this model delivers better accuracy and energy efficiency. The PRG330 can measure Altitude in 1m increments and display compass readings with 60-seconds of continuous. Aluminum Panel Bezel. Design features include a compact, sleek case and soft urethane band for a better fit to the wrist. One-touch access to digital compass, barometric pressure/altitude, and temperature readings keep important information at your fingertips. Everything about these models is designed and engineered to make them essential pieces of outdoor gear.