Waterproof Pulse Wireless polar heart rate monitor watch Digital cardio sensor Fitness sport Running hrm Heart Rate Chest Strap<br> Features:<br> Wireless receiving heartbeat signal transmitted from heartbeat brooch,chest band frequency is AM5.3KHz;<br> Time display: hours, minute, second;<br> Alarm clock function;<br> Give alarm shen heart rate exceeds the upper and lower limit values (60-220);<br> Timing (maximum time-keeping is 23 hours, 59 minutes, 59 seconds, 99);<br> 12/24 hour display format;<br> EL backlight;<br> Keystoke tone<br> Waterproof: 50m Waterproof (please not press watch button under water.)<br> Package Inlcuded:<br> 1 x Watch(Battery included)<br> 1 x Chest Strap(Battery included)<br> 1 x English Instruction