The Fitbit Versa 4 with Black Elastic Band and Charger in Black is a high-quality activity tracker designed for both indoor and outdoor use. It features a display resolution of 1920 x 1080 and is powered by batteries. This unisex adult fitness technology device provides measurements for heart rate, speed, time, resistance level, distance, and calories. With a sleek aluminum material construction, GPS sensors for accurate tracking, and a 1-year manufacturer warranty, the Fitbit Versa 4 is the perfect companion for running and jogging enthusiasts looking to monitor their fitness progress in both decimal and imperial units.