Readeel Sport Watch with Heart Rate Monitor, Fitness Activity Tracker & Running Exercise Timers, Calorie Counter, Pedometer, Countdown, Stopwatch, Dual Alarm and El Backlight with Rubber Gel Strap Digital Running Watch Black Matrix electronic display screen & PMMA lens, More pervious to light effect, good insulation & Corrosion resistant. Auto Date,Heart Rate Monitor,Alarm,Chronograph,Water Resistant,LED display,Shock Resistant,Stop Watch,Back Light 50 meters life waterproof Using of High strength composite materials, Heat resistant, high temperature resistance, corrosion resistance.lightweight & wear comfortable. Humanized strap design, Full hole strap, suitable for all the wrist, more breathable, water permeability.