Check the listing for details. Garmin Solar Standard Edition | Rugged Smartwatch with Solar Charging | Graphite. Color: Graphite, Condition: New. Listed at 399.99 USD. DO WHAT YOU LOVE, LONGER " type="large" theme="light">Instinct is a GPS smartwatch built to break convention, conquer the elements and endure longer. It’s now taking battery life to a new level by harnessing the power of the sun.Experience unprecedented battery life with solar charging.Do more. Charge less. Get up to 54 days in smartwatch mode.Military standard toughness lets you play rough without worry.GPS, GLONASS and Galileo. Your 3 best friends in the wild.Train smarter with built-in sports apps right on your wrist.Get notifications straight from your phone to your wrist. SPORTS APPSUse preloaded activity profiles for swimming, running, biking, hiking, rowing, strength and more.WRIST-BASED HEART RATEGet heart rate data1 along with alerts if your heart rate stays too high or too low while you’re at rest. Gauge how hard your heart is working during activities, even underwater.PULSE OXFor altitude acclimation or sleep monitoring, a Pulse Ox2 sensor uses light beams at your wrist to gauge how well your body is absorbing oxygen.STRESS TRACKINGHeart rate variability is used to calculate your stress level score, so you can see if you’re having a calm, balanced or stressful day.BODY BATTERY™ ENERGY MONITOROptimize your body’s energy reserves, using heart rate variability, stress, sleep and other data to gauge when you’re ready to be active or when you may need to rest. SPECIFICATIONS: Battery Life: Up to 24 Days. 54 with Solar Display Type: Monochrome, sunlight-visible, transflective memory in pixel (MIP) Water Rating: 10 ATM Lens Material: Power Glass Bezel Material: Fiber Reinforced Polymer Case Material: Fiber Reinforced Polymer Strap Material: Silicone Physical Size: 45 x 45 x 15.3 mm. Fits wrists with a circumference of 132 -224 mm Weight: 53 g Display Size: custom, two window design. 0.9 x 0.9 inches Display Resolution: 128 x 128 pixels Charging Method: Garmin Proprietary Charger Memory/ History 16 MB