Main Features:<br />With infrared function， it can be used for measuring heartbeat even calories， no need to wear chest strap<br />If need， you can set a alarm with it to remind you <br />Of course， it shows time and calendar and even split time<br />50m waterproof， no need to worry rainy days<br />Lightweight， no effect for your sports <br />Band length: 20.7cm<br />Band width: 16mm to 20mm<br />Case diameter: 4.2cm<br /><br />    Specifications<br />General<br />  Material: Rubber                                                  <br />                        Color: Yellow， Blue， Pink， Green， Orange， Purple                                                  <br />                        Features: 1/100s Stopwatch， Alarm， Date Display                                                  <br />                        Waterproof Grade: 50m                                                  <br />                        Best Use: Climbing， Cycling， Diving， Running， Mountaineering                                                 <br />Basic Information<br />  Product Weight: 0.041 kg                                                  <br />                        Package Weight: 0.067 kg                                                  <br />                        Product Dimension: 22 x 4.2 x `1.6 cm / 8.65 x 1.65 x NaN inches                                                  <br />                        Package Dimension: 28 x 7 x 2.2 cm / 11.00 x 2.75 x 0.86 inches                                                 <br />Package<br />  Package Contents: 1 x Sports Watch ( Built-in 1 x CR2032 Button Battery )， 1 x English User Manual                                                 <br /><br /><br /><br />                                            <br /><br /><br /><br />                                                <br />