The Fitbit Charge 3 Activity Tracker in Blue Gray/ Rose Gold Aluminum is a high-performance fitness tracker designed for both indoor and outdoor activities. With a display resolution of 161 x 160, this device provides accurate heart rate monitoring and GPS tracking for multi-sport activities. Its durable aluminum construction ensures longevity, while the battery life of up to 7 days allows for consistent use. Compatible with both iOS and Android operating systems, this unisex activity tracker by Fitbit is a reliable tool for fitness enthusiasts looking to track their performance and progress in English language settings. Still in box only used a few times