Scosche offers its Scosche Rhythm+ Armband Heart Rate Monitor
in Black, Green, or Pink for $79.99. Coupon code "SCOSCHE37" cuts the price to $50.39
. With free shipping
, that's the lowest total price we could find by $30. This waterproof armband features a 100-foot range, green/yellow optical sensor array, and an eight-hour battery life.