The different between water and energy water can be identified by placing the pen in the solution to be The pen head emits minerals energy water , while water does not emit light The BIO testing pen is easy to operate and to carry and use of use : Testing of water such as energy water machines , functional water machines , electrolytic water machines , ultrafiltration water purifiers , water machines with alkalines or mineralized filter , energy cups BIO tester pen is widely used for energy detection of various energy water machines , and can also be used to check thepurity of water and wine The BIO testing pen is used to detect the different between water , energy water , and minerals water Generally , traces and minerals in water can increase the energy in the water, Manufacturer: Watreketal