Strand Smart features a vibrant screen with great visibility, boasting a 1.83" TFT HD 240*380 pixel screen. Blue tooth 5.0 connectivity & Android 4.4/iOS 9.0 and above. Built from sturdy materials, using unibody construction. Leave your phone in the back-pocket, Strand Smart supports notifications from your favorite apps and more. 37.5mm x 45mm x 9.9mm diameter matte metal alloy case, greensilicon strap, 38grams, TFT glass, IP67 waterproof, g-sensor STK8321, Features include: - Blood Oxygen level monitoring - Heart Rate BPM monitoring (active or stationary) for 24 hours. - 100 + sport modes to track your exercise activity. - Sleep monitoring tracks sleep patterns. - Thermometer to track body temperature with alarms. - one-step blue tooth calling - women's health tracker - customizable dial - music player - breath training - step, calorie and distance counter - sedentary reminder - phone messaging notification - weather sync - stop watch - flash light - alarm reminder and more.