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three - phase speed adjustment
double mode power supply
with touch switch control
chip - on - board led
effective wind speed: 4.2m/s
battery capacity: 3000maah
battery voltage: 4v
input: 5a - 1a
power: 1w
power using time: weak wind - 4hours, middle wind - 2.5 hours, strong wind - 1.2 hours
working mode: USB port charging or built-in battery
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