Hydrogen Water Bottle 260ml 1100 to 1500ppb Portable Hydrogen Rich Water Generator Cup with LED Indicator Light for Home Fitness Office Travel ​​Item Type: Hydrogen Water BottleMaterial: Alloy, PC, PP, ABS, high borosilicate glass Weight: Approx. 966.00g/34.07oz Hydrogen Concentration: 1100 to 1500ppb Negative Potential: -650 to -350mv Water Temperature: 0 to 100℃, recommended ≤60℃ Switching Method: Button (single press to turn on, single press to turn off) Capacity: 260ml Product Size: Approx. 74x210mm/2.9x8.3in Power: ≤5W Charging Cable: DC head 3.5x1.35x12mm, the other end USB Battery: 3.7V 1500mAh lithium battery (takes about 3 hours to fully charge) (shipped with built in battery) Water Requirement: Drinkable water, such as purified water, pure water, mineral water, etc. Prohibited from using beverages, tea, alcohol, coffee, and other solutions. Battery Indicator: When the battery is low, the light will flash to remind you to charge it. If the battery continues to be used without charging, it will cause permanent damage to the internal lithium battery.