Hand held pulse/heart rate monitor with digital readout. Manufactured in a joint venture by 2 German giants, A.G. Bayer and Carl Zeiss
These are priced great but they are not perfect. You pay $50 or $200 for more precise units. These are easy to use, handy, low cost, especially in larger quantities (as low as $4.50 each for 12 dozen. We offer a satisfaction guaranteed 15 day return on these, but you pay shipping.