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The LEDs in the shower head turn on automatically as soon as you turn on the shower tap and water begins to flow through the shower head
Smart Display – How to Read Information
It does not require batteries and operates only in direct sunlight
Current Data (ENERGY Button): Instantaneous power consumed by the device (W)
H2O Power Water Calculator 12 Digits Ecological solar toys The LEDs in the showerCalculate conveniently and in harmony with nature! The H2O desktop calculator is a revolutionary device that requires only clean water to work! Forget about purchasing and disposing of batteries or lighting restrictions for solar calculators. Designed by Tango Group, this 12 digit calculator uses patented H2O water activated battery technology. This is a breakthrough, ecological solution for an everyday product at home and in the office, offering
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