In olden days, we used to count the currency manually which takes long time with many efforts. With the advancement of technology, and development in electronics, we got a counting machine which can count the cash when the bundle is kept inside. Actually the concept used is installation of a simple counter which counts with the touch resistant sensor. When the currency note touches the sensor, the count increments by one and the flow begins. This is the concept of counting machine.
But, are we satisfying with the current technology? Technology always advances. We are getting products scaled down day by day. And this property applies to this product too which resulted in a handy "Counting Ring". The concept of the counting ring is same as counting machine but the flexibility lies where we can actually wear it to our thumb to count the cash. This is based on IR( Infrared) technology. This is portable too very efficient too..