128 x 128 pixel display; Tracks distance, pace & calories; Step counter; Auto Pause(R) pauses & resumes timer based on speed; Auto goal learns users activity level & assigns a daily step goal; Move bar displays on device after a period of inactivity; Smart notifications when paired with Bluetooth(R)-enabled compatible smartphone; Time/distance alerts; Customizable screens; Calculates calories burned; Sleep monitoring; Instantly shares runs & activity tracking progress via social media by pairing a Bluetooth(R)-enabled compatible device with Garmin Connect(TM) Mobile; Water-resistant (5 ATM); Rechargeable Li-Ion battery; Includes charging/data cable; Large ; Battery life: 10 hours in training mode, 10 weeks in watch mode ; Black/Blue;