Wireless heart rate minitor watch

Feature:
Wireless receiving heartbeat signal transmitted from heartbeat brooch, chest band frequency is AM5.3KHz;
Time display: Hour, Minute, Second;
Alarm Clock function;
Give alarm when heart rate exceeds the upper and lower limit values (60~220).
Timing (maximum time-keeping is 23 hours, 59mimutes, 59 seconds, 99)
12/24 hour displaying format
EL backlight
Keystroke tone
5ATM water resistant