With GPS tracking, PurePulseTM heart rate monitor, exercise summaries, and call and text notifications, the SurgeTM more than lives up to its super watch moniker. Touch screen monochrome LCD with backlight for low light visibility. Durable and flexible elastomer wristband. Surgical grade stainless steel buckle. Sweat, rain and splash proof. GPS. Digital compass. Optical heart rate monitor. Three axis accelerometer. Three axis gyroscope. Vibration motor. Altimeter. Battery life: Up to seven hours. Charge time: One to two hours. Synchs automatically to tablets, computers and most smartphones. Imported.