Item number: LKLY4Eco-Drive technology harnesses the power of light from any natural or artificial light source and converts it into energy. It recharges continuously in any kind of light to run forever, even in the dark. Citizen Eco-Drive watches never need a battery replacement and come with an outstanding 5 year guarantee. Citizen Eco-Drive technology meets super tough design creates a watch for any adventure. This Royal Marines Commandos Super Tough watch has a super titanium and ion plated monocoque case which is exceptionally strong and 40% lighter than stainless steel. It’s shock and 300m water resistant, weather proof and anti-magnetic combined with an extremely hard wearing Kevlar band and authentic dog tag keeper. Your watch is ready to tackle any eventuality.