Shell: ABS<br />Strap: PU<br />Bottom cover / table back: stainless steel<br />Plastic, rubber strap<br />Built in battery life: normal use for one year or more (CR2032)<br />Waterproof: waterproof (can be made 30 meters waterproof)<br />Function:<br />Watch and monitor heart rate Become<br />Heart rate function<br />Measure of calories<br />Time display function: time and date display<br />Alarm function: timing, punctual timekeeping<br />Stopwatch function<br /><img src="http://img6.eachbuyer.com/x9/p100/eb01546_2.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/eb01546_3.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/eb01547_1.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/eb01547_2.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/eb01547_3.jpg" />