Roll these wheels along a surface to measure long distances. Choose a wheel diameter of 11.5” or larger for uneven surfaces. Wheels with a diameter less than 11.5” are good for smooth, hard surfaces.

Keep your phone in your pocket and your hands free—these smartwatches perform a variety of functions on your wrist. They connect to Apple and Android phones via Bluetooth, informing you when calls, texts, and other notifications arrive. Designed for harsh environments and rugged use, they meet military standards for resistance to hot and cold temperatures, shock, splashes, and submersion in up to 100 meters of water. These watches have a compass and GPS for tasks such as navigation, tracking and saving location coordinates, and calculating the area of a location by walking the perimeter. With weather and elevation monitoring, you can set the rate of barometric pressure change that will trigger a storm alert. These watches track health and fitness metrics over time, including heart rate, blood oxygen levels, and exercise. They have a solar battery in addition to a rechargeable lithium-ion one to extend the time between plug-in charging.

Navigate on foot with real-time GPS data. These handheld navigators access multiple Global Navigation Satellite Systems (GNSS) for accurate positioning even in remote locations and challenging environments such as dense forests. Use them to guide yourself to your destination, track and save up to 5,000 coordinates, and calculate the area of a location by walking its perimeter. They’re preloaded with topographic maps that include terrain contours, elevations, and bodies of water. Navigators have a color display, so it’s easy to read map details. Built for outdoor use, they stand up to splashes, rain, and snow.

To receive email, text, and call notifications on these navigators, link them to your smartphone via Bluetooth. Connect them to a computer with the included USB cable to upload additional maps or offload data and files. For extra storage, insert a memory card.