Heart rate monitor?

Anyone have any idea where someone can buy one of these? I am looking for one I can wear when I exercise. Thanks!!

About 17 years ago when I was pregnant and exercising I wore one around my chest (came with a watch) to make sure I stayed in my target heart rate zone.  It was by Polar and was great, even wore it in the pool. About 2 years ago I bought one at Dick's Sporting Goods.  A watch type.  It was good, don't remember where I put it though.  I can usually tell if I'm in the zone if I'm slightly out of breath but able to carry on a conversation, and sweating.

My DH has bought them at drugstore.com.  You can usually use flex spending to get them too.

I bought one online not too long ago, but don't remember which site.  I googled Polar Heart Rate Monitor and checked out the various sites that sold them to compare prices.  Then I googled that site name + coupon, and got a coupon for like 15% off or free shipping.  I always use google to look for additional discounts for whatever website I'm purchasing from.... I bought the Polar RS200 model - it is a step up from the basic monitor but has lots of nice features.  A heart rate monitor is a great tool to help you get a good workout!