The Citizen Calibre 2100 is a wrist watch that's stylish and suitable for both business and casual wear. The titanium bracelet band of the Citizen AV0021-52H make it lighter but stronger than steel for long-lasting durability. The advanced chronograph in the Citizen Calibre 2100 includes one hour and 12 hour sub-dials with 1/5 second hand for efficient time keeping. The alarm is set very easily by just pulling out the alarm crown on the Citizen AV0021-52H. Citizen Calibre 2100 has a power reserve of 240 days once it is fully charged promising you uninterrupted service. This eco-drive wrist watch for men derives power from any light source setting you free from battery hassles.