This Omron Heart Rate Monitor works with a chest transmitter, so it is very accurate. This one is almost new. I only used for less than 5 times and keep them nicely in original box. If you want to watch your heart rate in the proper zone while you work out, this is a good one to start with.

There is also a small bag coming with the package, so that you can keep them well with you on your way to work out.

-Heart rate monitor is easy to program
-Comfortable to wear with ventilated watch band
-Helps maintain a proper heart rate with a high/low heart rate alarm
-Chest transmitter belt sends data to the receiver at a distance of up to 98 feet (30 meters)
-Built with a backlight function, time of day display, and daily reminder alarm