Variable Heart Rate

203 variable heart rate products are offered for sale by suppliers on Alibaba.com, of which activity & fitness trackers accounts for 44%, smart watches accounts for 7%, and house-service detector tester accounts for 1%. A wide variety of variable heart rate options are available to you, such as colorful, white and black.You can also choose from heart rate measuring, waterproof and sleep monitoring variable heart rate,as well as from plastic, abs, and silicone variable heart rate, and whether variable heart rate is unisex, female, or men.