Technology has worked for human development from time to time. Through this, it has resolved a lot of bigger problems. Due to the difficulties of life, a gadget company has introduced a very useful device which keeps an eye on the heartbeat of the human heart. 

Wearing it on the wrist by the user helps in removing the tension by rhythmic beats. Researchers at the University of London evaluated the device named Doppel on the cool effects. 

This is a wristband for the user which can be easily worn on the wrist. This device has special rhythm of heart beats. In many studies, it has emerged that beyond music there is a more positive effect on biological rhythm. 

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