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 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 The BIO testing pen is easy to operate and to carry and use 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 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, Manufacturer: Whoasyst