I bought this heart rate monitor for my husband. During the first use, it worked great then started giving low battery signals. We opened the battery case and found it full of sweat and the battery was rusty. After changing the battery, the rust returned after the first use.
My husband contacted the technical department at Oregon Scientific to see if a gasket was missing. Their only advice was to send it back to the dealer for replacement. Future attempts to contact the technical department were ignored.
If there is no gasket to keep the battery case waterproof, we believe that a replacement would do the same. This unit will not give satisfactory performance unless the battery case is waterproof. We don't want a replacement if it is like the first unit.
My husband enjoyed the radio that came with the unit.Get more detail about Heart Rate Chest Belt with Radio.