The Garmin Forerunner 255 Smart Sports Watch Music is designed to help you run at a higher level, with features to give you insights on your training and recovery, and preloaded music to motivate you. It features durable Corning Gorilla Glass 3, a silicone strap, built-in GPS, menstrual tracking, safety and tracking features, smart notifications, and more. It's also water resistant up to 50m, and is Bluetooth, ANT+ and Wi-Fi compatible. It also has a battery life up to 14 days in smartwatch mode. With the Garmin coach feature, you can receive free adaptive training plans, such as 5K, 10K and half-marathon programs, plus wrist-based heart rate monitoring, pulse ox sensor monitoring, music syncing, and a body battery energy monitor. The Race widget gives you tips and completion time predictions, while the PacePro feature offers GPS-based pace guidance. Sleep monitoring and a sleep score are also available, as well as stress tracking and intensity minutes. SatIQ technology ensures optimal accuracy and battery life.