Strand Smart features a vibrant screen with great visibility, boasting a 1.72″ IPS HD 360*360 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, grey silicon 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