The BERING Slim Solar collection beats to the rhythm of nature! Because its energy source is environmentally friendly and infinitely available: light! Not only sunlight but any kind of light is converted into electrical energy by the solar cell under the face and stored in a rechargeable secondary battery. No battery change is required as in quartz watches. The watch has a power reserve, so that - once fully charged – it runs for 6 to 12 months. Even if it is stored in complete darkness during this time. Scratch resistant sapphire crystal, brushed stainless steel, the finest straps in mesh. Quick Ship items ship directly from the manufacturer within 3 to 5 business days. Photos are enlarged to show detail.