Meet Fitbit Sense–the advanced health smartwatch that helps you tune into your body and guides you toward better health. Assess your heart for atrial fibrillation (Afib) right from your wrist, detect and manage stress, better understand your sleep quality and even keep an eye on patterns in your skin temperature or well-being with SpO2. Plus, Sense unlocks a 6-month free trial of personalized guidance and advanced insights from Fitbit Fitbit Sense Display1.58 inches | AMOLED | Touchscreen Body Aluminum | Silicone straps Waterproof Rating 5ATM Media Microphone | Loudspeaker Storage 4GB ROM Battery Life 6 days