Citizen’s simple yet revolutionary Eco-Drive technology harnesses the power of light, whether natural or artificial, and converts it into energy, storing the surplus in a power cell. Designed to charge from any form of light source, from sunlight to desk lamps, you can go about your daily life and be confident that your Eco-Drive won’t stop. This Titanium Brycen mens watch is bold and sporty. Created from Citizen's Super Titanium technology, with a surface hardening finish called Druatect, this timepiece is 40% lighter than stainless steel and 5 times more scratch resistant. Featuring a titanium bracelet and 46mm case, blue dial with 1/5th second chronograph and 12/24 hour time and date. Ref: CA4240.82L Product InformationBrand: Citizen Eco-Drive Caliber number B620Case Material: Titanium Case Size: 46mmType of Strap: Titanium bracelet Glass Material: Sapphire CrystalDial: BlackWater Resistant: 100mGender: Mens