Get out into the great outdoors with a solar-powered Pro Trek featuring eco-friendly materials that care for the environment. Explore with a gentler footprint! FEATURES: Environmentally friendly Bio-mass plastic* for the case, band, and back cover without sacrificing comfortable wearability The case and urethane band are crafted from biomass plastics made with castor oil and the band from biomass plastics made with corn The duplex LCD of this model provides a larger easy to read display The rotating bezel makes it simple to record compass readings, and the Tough Solar charging system keeps the advanced functionality on the go Perfect for trekking, this watch comes equipped with a rotating bezel handy to keep track of bearings Triple sensor (Altimeter/Barometer, Thermometer and Compass) Radio Controlled (Multi-Band 6) for accurate timekeeping BATTERY: Accuracy: 15 seconds per month Approx. battery operating time: 7 months on rechargeable battery (operation period with normal use without exposure to light after charge) 27 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge) WARRANTY: 1 year limited warranty * Biomass plastics are polymers produced using chemical or biological synthesis of materials sourced from plant matter or other renewable organic substances and are widely thought to help reduce environmental impact and promote the shift to a circular economy.