Waterproof Solar Power Digital Watches Altimeter Barometer Mini Compass Thermometer Outdoor Equipment Lightweight,easy to carry and use Tow-mode power supplied by solar cells and CR2032 battery Ideal equipment for outdoor sports enthusiasts 6-in-1 device:altimeter,barometer,temperature,compass,time and weather forecast Package:1 x multifunctional digital altimeter,1 x nylon strap,1 x CR2032 battery