An advanced technological watch, this Pulsar Tech Gear for Divers has Solar 4000 Technology that is an echo-friendly power system that, when fully charged by any light source, will run for 180 days, and you never need to change the battery. It also has a one-way rotating bezel, shows the date, is water resistant up to 200 M., and has LumiBrite hands and markers that will glow brightly for hours without pushing a button or drawing energy from the battery. This model has a rubber band and a black dial. eWatches.com is an Authorized Pulsar Dealer.