Features:_x005F_x000D_Wireless Heartbeat signal transmitted from chest band frequency at AM5.3KHz._x005F_x000D_Time display with Hour, Minute, Second._x005F_x000D_Alarm clock function._x005F_x000D_Alarm sounded when heart rate exceeds the upper and lower limit values(60-220)._x005F_x000D_Timing (max. time-keeping is 23 hour, 59 minutes, 59 seconds, 99)._x005F_x000D_12 or 24 hour display format._x005F_x000D_Backlight and Noctilucent function._x005F_x000D_Keystroke tone._x005F_x000D_Waterproof up to 3 meters._x005F_x000D__x005F_x000D_s:_x005F_x000D_Chest transmitter strap: 66-95cm(Elastic)_x005F_x000D_Language: English_x005F_x000D_Movement type: Electronic_x005F_x000D_Waterproof Depth: 3 meters_x005F_x000D_Close Hooks: Buckle_x005F_x000D_Case Shape: Round_x005F_x000D_Function: Alarm Clock, Heart Rate Tracker,24 hour instruction, World Time, etc._x005F_x000D__x005F_x000D_Specifications:_x005F_x000D_Material: rubber strap, steel case_x005F_x000D_Color: black_x005F_x000D_Total size:245*22mm_x005F_x000D_Dial size:41*16mm_x005F_x000D__x005F_x000D_Packing Included:_x005F_x000D_1 x Watch_x005F_x000D_1 x English manual_x005F_x000D_1 x Chest transmitter strap _x005F_x000D__x005F_x000D_Notes:_x005F_x000D_1.The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness._x005F_x000D_2.Please allow slight deviation for the measurement data.