Professional Promaster watches for high-speed adventurers with all the tools for the toughest terrain. Powered by any light source, continuously and sustainably, eliminating the need to replace watch batteries. Imperial Altimeter, 9h: Sub Altimeter, Compass (power reserve) +/-15 sec/month, altimeter 1,000ft-32,000ft, Altimeter adjusting function: +/-300(per2.5), Electronic Compass function, Date Silver-Tone Stainless Steel Luminous Hands and Markers, Power Reserve Indicator, and Anti-Reflective Mineral Crystal 200 Meters Water Resistance and 5 Year Limited Warranty