Uniharpa Self Cleaning Water Bottle uses innovative non-toxic and mercury-free UV-C LED technology to purify the bottle and disinfect the water inside it. The ultraviolet ray sterilizing lamp will emit ultraviolet ray with wavelength of 275nm to kill bacteria by destroying or changing DNA, sterilization rate up to 99.99%. According to World Health Organization, UV-C technology is “effective for inactivating microbes in drinking water, and it does not introduce chemicals or cause the production of harmful disinfection by-products in the water”. Three Sterilization Modes: 1.Normal Mode Sterilization: Double-click the capacitor button to activate the UV lamp for 60 seconds. (When the UV lamp is working, the blue LED light should slowly, and after one minute, the green LED light will be on for 1 second to prompt completion.) 2.Super Mode Sterilization: Tap the capacitor button 5 times to activate the UV lamp to work for 120 seconds. (When the UV lamp is working, the blue LED light should slowly, and the green LED light should be on for 1 second after 2 minutes have passed, indicating completion.) 3.Self-Cleaning Mode: Uniharpa Self Cleaning Water Bottle turns on once every 4 hours. For 20 seconds each time, loop three times, after 3 times, it goes into hibernation state. To sterilize the bottle by shining the deep UV light on the inside surface of the bottle. This will ensure that your bottle does not accumulate mold, bacteria, viruses or any harmful pathogens.