Designed for professional use that will let you reach your limits. Strengthen your watch collection with the latest Promaster Sky. Featuring a Super Titanium bracelet, making it 5 times harder than stainless steel yet 40% lighter. It is resilent to the rigors of everyday wear. Crafted with a sleek deep blue dial, sapphire glass and a 44.4 mm case. For enhanced performance, it also offers an emergency sign on the bezel, perpetual calendar, radio controlled, world time in 26 cities, aviation slide rule inner ring and a cockpit dial design. Powered by Eco-Drive technology, never needs a battery, only a light source.