The iHealth Activity and Sleep Tracker tracks every step youtake, distance travelled, calories burned, and sleep efficiency. It usesBluetooth 4.0 with low energy technology and is sweat, rain and splash proof.Its silent alarm feature wakes you up gently without disturbing the person nextto you, and the smart alarm feature helps you remember to be more active. Aplayful Activity Level feature motivates you to be more active for differentlevels of steps achieved. Each Tracker comes with two color options forwristbands and waist clips. This Tracker, along with the free iHealth MyVitalsapp, can keep you motivated and help you stay on track to a more active andhealthier lifestyle.