The PRO TREK brand stands for experiencing, enjoying, and preserving the wonders of nature. The PRW61 uses eco-friendly biomass plastics in the case, band, and case back. For the first time in a PRO TREK or any Casio watch, the case and band are made from eco-friendly biomass plastics instead of conventional resins. The use of biomass plastics also delivers uncompromising resistance to hard use as well as comfort on the wrist. We are proud of this new material application for our line of premiere outdoor tools, PRO TREK. For optimal wear resistance and an airtight seal, the case back is made from high-strength engineered plastics made from biomass materials. The case back has a wider flat surface, as well, for better torsional resistance. Dial contrast has been enhanced by using vivid white for the large bar indexes and hour and the minute hands, delivering optimum visibility in the field. The stainless steel bezel is engraved with city codes for an outdoor gear look. As the original function of the watch, it also has functions such as multi-band 6 and tough solar. It is a model packed with high functionality and practicality that correspond to various scenes in just size. Number of Batteries: 1 Included: 1 Watch(es) Features: Water Resistant, Quick Ship Jewelry Closure: Buckle Power Source: Battery (included) Watch Movement: Quartz Water Resistance: 100m Band Color: Black Dial Color: Black Case Thickness: 15mm Case Width: 51mm Watch Band Length: 9 Inch Band Content: Rubber Case Materials: 100% Resin Band Width: 20mm Care: Wipe Clean Country of Origin: Imported Quick Ship items ship directly from the manufacturer within 3 to 5 business days. Photos are enlarged to show detail.